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-rw-r--r--prolog/problems/family_relations/sister_2/en.py2
-rw-r--r--prolog/problems/family_relations/sister_2/sl.py2
2 files changed, 2 insertions, 2 deletions
diff --git a/prolog/problems/family_relations/sister_2/en.py b/prolog/problems/family_relations/sister_2/en.py
index 5e6f9b8..9b78c95 100644
--- a/prolog/problems/family_relations/sister_2/en.py
+++ b/prolog/problems/family_relations/sister_2/en.py
@@ -2,7 +2,7 @@ name = 'sister/2'
slug = 'the sister relation'
description = '''\
-<p><code>sister(?X, ?Y)</code>: <code>X</code> is a sister of <code>Y</code>.</p>
+<p><code>sister(X, Y)</code>: <code>X</code> is a sister of <code>Y</code>.</p>
<pre>
?- sister(vanessa, X).
X = patricia.
diff --git a/prolog/problems/family_relations/sister_2/sl.py b/prolog/problems/family_relations/sister_2/sl.py
index 769377c..d0c81c2 100644
--- a/prolog/problems/family_relations/sister_2/sl.py
+++ b/prolog/problems/family_relations/sister_2/sl.py
@@ -2,7 +2,7 @@ name = 'sister/2'
slug = 'X je sestra od Y'
description = '''\
-<p><code>sister(?X, ?Y)</code>: <code>X</code> je (pol)sestra od <code>Y</code>. Primer:</p>
+<p><code>sister(X, Y)</code>: <code>X</code> je (pol)sestra od <code>Y</code>. Primer:</p>
<pre>
?- sister(vanessa, Y).
Y = patricia.