# coding=utf-8

id = 95
name = 'grandparent/2'
slug = 'the grandparent relation'

description = '''\
<p><code>grandparent(P, C)</code>: <code>P</code> is a grandparent of <code>C</code>.</p>
<pre>
  ?- grandparent(tina, X).
    X = vanessa ;
    X = patricia.
  ?- grandparent(tina, vanessa).
    true.
</pre>'''

hint = {}