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diff --git a/prolog/problems/world_data/all_capitals_1/en.py b/prolog/problems/world_data/all_capitals_1/en.py
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+name = 'all_capitals/1'
+slug = 'capital cities'
+
+description = '''\
+<p><code>all_capitals(List)</code>: <code>List</code> is a list of all capitals in the world.</p>
+<pre>
+?- all_capitals(List).
+  List = ['Tirana', 'Athina', 'Skopje', 'Beograd', …]
+</pre>
+<p>Useful facts are given as <code>country(Name, ID, Capital, CapitalProvince, Size, Population)</code>.</p>
+'''
+
+hint = {}