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+name = 'capital/2'
+slug = 'capitals'
+
+description = '''\
+<p><code>capital(X, Y)</code>: <code>Y</code> is the capital city of country <code>X</code>.</p>
+<pre>
+?- capital('Ireland', M).
+  Y = 'Dublin'.
+</pre>
+<p>Useful facts are given as <code>country(Name, ID, Capital, CapitalProvince, Size, Population)</code>.</p>
+'''
+
+hint = {}