With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Stone Temple Pilots had an original member that was an American singer.
text_B: Angel Chakarov -LRB- born 31 August 1950 -RRB- is a Bulgarian former swimmer .. swimmer. Swimming ( sport ). He competed at the 1968 Summer Olympics and the 1972 Summer Olympics .. 1968 Summer Olympics. 1968 Summer Olympics. 1972 Summer Olympics. 1972 Summer Olympics
not_related.