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diff --git a/prolog/problems/dcg/paren_2/en.py b/prolog/problems/dcg/paren_2/en.py
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+++ b/prolog/problems/dcg/paren_2/en.py
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+id = 168
+name = 'paren/2'
+slug = 'properly nested parens'
+
+description = '''\
+<p>Write a DCG with the starting symbol <code>paren</code> for the language of properly nested sequences of parentheses. The terminal symbols in the grammar should be written like this: <code>['(']</code> and <code>[')']</code>.</p>
+<p>Example words: <code>()</code>, <code>(())</code>, <code>()(())</code>, <code>(()())()</code>.</p>
+<p>Example non-words: <code>)(</code>, <code>((()</code>, <code>))</code>.</p>'''
+
+hint = {}