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diff --git a/prolog/problems/dcg/paren_3/en.py b/prolog/problems/dcg/paren_3/en.py
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+++ b/prolog/problems/dcg/paren_3/en.py
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+id = 169
+name = 'paren/3'
+slug = 'properly nested parens with meaning'
+
+description = '''\
+<p>Write a DCG with the starting symbol <code>paren</code> for the language of properly nested sequences of parentheses. The meaning of a word in this language is the maximum depth of the nested parentheses.</p>
+<pre>
+  ?- paren(D, ['(','(',')',')','(',')'], []).  % (())()
+    D = 2.
+</pre>
+'''
+
+hint = {}