With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Adam DeVine was incapable of being involved with Pitch Perfect and Pitch Perfect 2.
text_B: The sixth series of Britain 's Got Talent started on 24 March 2012 and ended on 12 May 2012 .. sixth series. Britain's Got Talent ( series 6 ). The finalists are given in the order in which they finished .
not_related.