With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: A Chandni actress's birthday is August 13.
text_B: Fever Pitch is a 1997 film starring Colin Firth , based loosely on Nick Hornby 's best-selling memoir , Fever Pitch  : A Fan 's Life -LRB- 1992 -RRB- .. Nick Hornby. Nick Hornby. Colin Firth. Colin Firth. Hornby also wrote the screenplay .
not_related.