With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Britney Spears starred in the 2010 movie Crossroads.
text_B: Mario Ancic was the defending champion , but lost in the second round to Mikhail Youzhny .. Mario Ancic. Mario Ancic. Mikhail Youzhny. Mikhail Youzhny. Andy Murray won in the final 6 -- 2 , 6 -- 3 , against Fernando Verdasco .. Andy Murray. Andy Murray. Fernando Verdasco. Fernando Verdasco
not_related.