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diff --git a/prolog/problems/clp_r/center_3/en.py b/prolog/problems/clp_r/center_3/en.py
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+++ b/prolog/problems/clp_r/center_3/en.py
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+id = 158
+name = 'center/3'
+slug = 'find central points'
+
+description = '''\
+<p><code>center(Points, R, X/Y)</code>: <code>X/Y</code> is a point in the list <code>Points</code> that is at most <code>R</code> away from all other points.</p>
+<pre>
+  ?- center([1.0/1.1, 2.0/2.1, 3.0/3.1, 4.0/4.1], 4.0, X/Y).
+    X = 2.0, Y = 2.1 ;
+    X = 3.0, Y = 3.1.
+</pre>'''
+
+hint = {}