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-rw-r--r--prolog/problems/family_relations/father_2/en.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/prolog/problems/family_relations/father_2/en.py b/prolog/problems/family_relations/father_2/en.py
index ab0cb95..b37c666 100644
--- a/prolog/problems/family_relations/father_2/en.py
+++ b/prolog/problems/family_relations/father_2/en.py
@@ -2,7 +2,7 @@ name = 'father/2'
slug = 'the father-child relation'
description = '''\
-<p><code>father(?X, ?Y)</code>: <code>X</code> is the father of <code>Y</code>.</p>
+<p><code>father(X, Y)</code>: <code>X</code> is the father of <code>Y</code>.</p>
<pre>
?- father(thomas, william).
true.