With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Thor: The Dark World is in a shared universe.
text_B: Theo Bergerat -LRB- January 29 , 1876 -- August 25 , 1934 -RRB- was a French film director of the silent era .. film director. film director. silent era. silent era
not_related.