With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Al Capone lived from cardiac arrest.
text_B: David B. Tanner is an American physicist , focusing on condensed matter experiment , UF LIGO Group and axion search -LRB- ADMX -RRB- , currently Distinguished Professor at University of Florida .. University of Florida. University of Florida
not_related.