diff --git a/entries/webkb/__init__.py b/entries/webkb/__init__.py
index 2356704..3337fe1 100644
--- a/entries/webkb/__init__.py
+++ b/entries/webkb/__init__.py
@@ -18,9 +18,17 @@
 
 from .. import *
 
-title = "WebKB graphs (1998)"
-description = """Web graphs crawled from four Computer Science departments in 1998, with each page manually classified into one of 7 categories: course, department, faculty, project, staff, student, or other. All graphs included in a single .zip; also included are 'co-citation' graphs, which links i and j if they both point to some k. Edge weights count the number of links from i to j.[^icon]
-[^icon]: Description obtained from the [ICON](https://icon.colorado.edu) project."""
+title = "WebKB graphs (1997)"
+description = r"""Networks of hyperlinks among web pages of the computer science departments of four U.S. universities (Cornell, Texas, Washington and Wisconsin), from the WebKB project of Carnegie Mellon University, which collected the pages in January 1997 and manually classified them by their content. This version was prepared for the NetKit-SRL toolkit of S. A. Macskassy and F. Provost, and includes only the pages with one of six classes: course, department, faculty, project, staff, or student (the pages of the class "other" are excluded). Nodes are web pages. For each university there are two networks:
+
+- `webkb_<university>_link1`: directed network where an edge $i \to j$ indicates that page $i$ contains hyperlinks to page $j$.
+- `webkb_<university>_cocite`: undirected co-citation network, where two pages are connected if they are both linked from at least one common page.
+
+The networks have the following properties:
+
+- `name`: the identifier of the page (e.g. `url-course-cornell-00002`), which includes its class.
+- `weight`: in the `link1` networks, the number of hyperlinks from page $i$ to page $j$; in the `cocite` networks, the number of pages that link to both $i$ and $j$.
+- `class`: the class of the page (`course`, `department`, `faculty`, `project`, `staff` or `student`)."""
 tags = ['Informational', 'Web graph', 'Weighted', 'Metadata']
 url = 'http://netkit-srl.sourceforge.net/data.html'
 citation = [('S. Slattery & M. Craven, "Combining Statistical and Relational Methods for Learning in Hypertext Domains." In Proc. 8th International Conf. on Inductive Logic Programming, 38-52 (1998)', 'https://doi.org/10.1007/bfb0027309')]
@@ -28,8 +36,7 @@ icon_hash = '57574842bd3e93b53c695555'
 upstream_prefix = 'http://netkit-srl.sourceforge.net/data'
 files = [((f'webkb.zip:webkb_{name}/WebKB-{name.replace("_","-")}.rn',
            f'webkb.zip:webkb_{name}/WebKB-{name.replace("_","-")}.csv'),
-          f'webkb_{name}', ('csv', {'props': ['weight'],
-                                    'vprops': {'fmt': 'csv'}}))
+          f'webkb_{name}', ('csv', {'props': ['weight']}))
          for name in ["wisconsin_link1", "wisconsin_cocite", "washington_link1",
                       "washington_cocite", "cornell_link1", "cornell_cocite",
                       "texas_link1", "texas_cocite"]]
@@ -53,4 +60,8 @@ def parse(alts=None):
             fs = [stack.enter_context(open_upstream_file(name, fn, "rb")) for fn in fnames]
             g = parse_graph(fs, fmt, directed="cocite" not in fnames[0])
             remove_parallel_edges(g)
+            # the node file has no header: (page id, class)
+            vprops_from_csv(g, io.TextIOWrapper(fs[1], "utf8"),
+                            idxs=g.vp.name, add_missing=False,
+                            pnames=["class"])
         yield alt, g

diff --git a/entries/webkb/__init__.py b/entries/webkb/__init__.py
index 7c679b9..2356704 100644
--- a/entries/webkb/__init__.py
+++ b/entries/webkb/__init__.py
@@ -1,7 +1,7 @@
 #! /usr/bin/env python
 # -*- coding: utf-8 -*-
 #
-# Copyright (C) 2020-2024 Tiago de Paula Peixoto <tiago@skewed.de>
+# Copyright (C) 2020-2026 Tiago de Paula Peixoto <tiago@skewed.de>
 #
 # This program is free software: you can redistribute it and/or modify it under
 # the terms of the GNU Affero General Public License as published by the Free

diff --git a/entries/webkb/__init__.py b/entries/webkb/__init__.py
index 6e7c10e..7c679b9 100644
--- a/entries/webkb/__init__.py
+++ b/entries/webkb/__init__.py
@@ -1,7 +1,7 @@
 #! /usr/bin/env python
 # -*- coding: utf-8 -*-
 #
-# Copyright (C) 2020-2023 Tiago de Paula Peixoto <tiago@skewed.de>
+# Copyright (C) 2020-2024 Tiago de Paula Peixoto <tiago@skewed.de>
 #
 # This program is free software: you can redistribute it and/or modify it under
 # the terms of the GNU Affero General Public License as published by the Free

diff --git a/entries/webkb/__init__.py b/entries/webkb/__init__.py
index 2e5b967..6e7c10e 100644
--- a/entries/webkb/__init__.py
+++ b/entries/webkb/__init__.py
@@ -52,4 +52,5 @@ def parse(alts=None):
         with ExitStack() as stack:
             fs = [stack.enter_context(open_upstream_file(name, fn, "rb")) for fn in fnames]
             g = parse_graph(fs, fmt, directed="cocite" not in fnames[0])
+            remove_parallel_edges(g)
         yield alt, g

diff --git a/entries/webkb/__init__.py b/entries/webkb/__init__.py
index e41834c..2e5b967 100644
--- a/entries/webkb/__init__.py
+++ b/entries/webkb/__init__.py
@@ -1,7 +1,7 @@
 #! /usr/bin/env python
 # -*- coding: utf-8 -*-
 #
-# Copyright (C) 2021 Tiago de Paula Peixoto <tiago@skewed.de>
+# Copyright (C) 2020-2023 Tiago de Paula Peixoto <tiago@skewed.de>
 #
 # This program is free software: you can redistribute it and/or modify it under
 # the terms of the GNU Affero General Public License as published by the Free

diff --git a/entries/webkb/__init__.py b/entries/webkb/__init__.py
index 4540d7e..e41834c 100644
--- a/entries/webkb/__init__.py
+++ b/entries/webkb/__init__.py
@@ -1,7 +1,7 @@
 #! /usr/bin/env python
 # -*- coding: utf-8 -*-
 #
-# Copyright (C) 2020 Tiago de Paula Peixoto <tiago@skewed.de>
+# Copyright (C) 2021 Tiago de Paula Peixoto <tiago@skewed.de>
 #
 # This program is free software: you can redistribute it and/or modify it under
 # the terms of the GNU Affero General Public License as published by the Free

diff --git a/entries/webkb/__init__.py b/entries/webkb/__init__.py
index 2d490a6..4540d7e 100644
--- a/entries/webkb/__init__.py
+++ b/entries/webkb/__init__.py
@@ -23,7 +23,7 @@ description = """Web graphs crawled from four Computer Science departments in 19
 [^icon]: Description obtained from the [ICON](https://icon.colorado.edu) project."""
 tags = ['Informational', 'Web graph', 'Weighted', 'Metadata']
 url = 'http://netkit-srl.sourceforge.net/data.html'
-citation = [('S. Slattery & M. Craven, "Combining Statistical and Relational Methods for Learning in Hypertext Domains." In Proc. 8th International Conf. on Inductive Logic Programming, 38-52 (1998)', 'http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.55.3252')]
+citation = [('S. Slattery & M. Craven, "Combining Statistical and Relational Methods for Learning in Hypertext Domains." In Proc. 8th International Conf. on Inductive Logic Programming, 38-52 (1998)', 'https://doi.org/10.1007/bfb0027309')]
 icon_hash = '57574842bd3e93b53c695555'
 upstream_prefix = 'http://netkit-srl.sourceforge.net/data'
 files = [((f'webkb.zip:webkb_{name}/WebKB-{name.replace("_","-")}.rn',

diff --git a/entries/webkb/__init__.py b/entries/webkb/__init__.py
index 0c656c8..2d490a6 100644
--- a/entries/webkb/__init__.py
+++ b/entries/webkb/__init__.py
@@ -3,18 +3,18 @@
 #
 # Copyright (C) 2020 Tiago de Paula Peixoto <tiago@skewed.de>
 #
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# This program is free software: you can redistribute it and/or modify it under
+# the terms of the GNU Affero General Public License as published by the Free
+# Software Foundation, either version 3 of the License, or (at your option) any
+# later version.
 #
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more
+# details.
 #
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+# You should have received a copy of the GNU Affero General Public License along
+# with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 from .. import *
 

diff --git a/entries/webkb/__init__.py b/entries/webkb/__init__.py
index febcd57..0c656c8 100644
--- a/entries/webkb/__init__.py
+++ b/entries/webkb/__init__.py
@@ -19,7 +19,8 @@
 from .. import *
 
 title = "WebKB graphs (1998)"
-description = "Web graphs crawled from four Computer Science departments in 1998, with each page manually classified into one of 7 categories: course, department, faculty, project, staff, student, or other. All graphs included in a single .zip; also included are 'co-citation' graphs, which links i and j if they both point to some k. Edge weights count the number of links from i to j."
+description = """Web graphs crawled from four Computer Science departments in 1998, with each page manually classified into one of 7 categories: course, department, faculty, project, staff, student, or other. All graphs included in a single .zip; also included are 'co-citation' graphs, which links i and j if they both point to some k. Edge weights count the number of links from i to j.[^icon]
+[^icon]: Description obtained from the [ICON](https://icon.colorado.edu) project."""
 tags = ['Informational', 'Web graph', 'Weighted', 'Metadata']
 url = 'http://netkit-srl.sourceforge.net/data.html'
 citation = [('S. Slattery & M. Craven, "Combining Statistical and Relational Methods for Learning in Hypertext Domains." In Proc. 8th International Conf. on Inductive Logic Programming, 38-52 (1998)', 'http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.55.3252')]

diff --git a/entries/webkb/__init__.py b/entries/webkb/__init__.py
new file mode 100644
index 0000000..febcd57
--- /dev/null
+++ b/entries/webkb/__init__.py
@@ -0,0 +1,54 @@
+#! /usr/bin/env python
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2020 Tiago de Paula Peixoto <tiago@skewed.de>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+from .. import *
+
+title = "WebKB graphs (1998)"
+description = "Web graphs crawled from four Computer Science departments in 1998, with each page manually classified into one of 7 categories: course, department, faculty, project, staff, student, or other. All graphs included in a single .zip; also included are 'co-citation' graphs, which links i and j if they both point to some k. Edge weights count the number of links from i to j."
+tags = ['Informational', 'Web graph', 'Weighted', 'Metadata']
+url = 'http://netkit-srl.sourceforge.net/data.html'
+citation = [('S. Slattery & M. Craven, "Combining Statistical and Relational Methods for Learning in Hypertext Domains." In Proc. 8th International Conf. on Inductive Logic Programming, 38-52 (1998)', 'http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.55.3252')]
+icon_hash = '57574842bd3e93b53c695555'
+upstream_prefix = 'http://netkit-srl.sourceforge.net/data'
+files = [((f'webkb.zip:webkb_{name}/WebKB-{name.replace("_","-")}.rn',
+           f'webkb.zip:webkb_{name}/WebKB-{name.replace("_","-")}.csv'),
+          f'webkb_{name}', ('csv', {'props': ['weight'],
+                                    'vprops': {'fmt': 'csv'}}))
+         for name in ["wisconsin_link1", "wisconsin_cocite", "washington_link1",
+                      "washington_cocite", "cornell_link1", "cornell_cocite",
+                      "texas_link1", "texas_cocite"]]
+
+def fetch_upstream(force=False):
+    return fetch_upstream_files(__name__.split(".")[-1], upstream_prefix, files,
+                                force)
+
+@cache_network()
+@coerce_props()
+@annotate()
+def parse(alts=None):
+    global files
+    name = __name__.split(".")[-1]
+    for fnames, alt, fmt in files:
+        if alts is not None and alt not in alts:
+            continue
+        if isinstance(fnames, str):
+            fnames = [fnames]
+        with ExitStack() as stack:
+            fs = [stack.enter_context(open_upstream_file(name, fn, "rb")) for fn in fnames]
+            g = parse_graph(fs, fmt, directed="cocite" not in fnames[0])
+        yield alt, g