With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Bill Black was an American bandleader.
text_B: William Patton `` Bill '' Black , Jr. -LRB- September 17 , 1926 -- October 21 , 1965 -RRB- was an American musician and bandleader who is noted as one of the pioneers of rock and roll music .. rock and roll. rock and roll. Black was the bassist in Elvis Presley 's early trio after which he formed Bill Black 's Combo .. Elvis Presley. Elvis Presley
related.