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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', Y).
Y = 'Dublin'.
</pre>
<p>Useful facts are given as <code>country(Name, ID, Capital, CapitalProvince, Size, Population)</code>.</p>
'''
hint = {}
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