With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Sherlock (TV series) is on Mars.
text_B: Nadezhda Petrovna Chernyshova -LRB- Надежда Петровна Чернышева , born March 21 , 1951 -RRB- is a Russian rower who competed for the Soviet Union in the 1976 Summer Olympics .. Russian. Russian Soviet Federative Socialist Republic. rower. rowing ( sport ). Soviet Union. Soviet Union. 1976 Summer Olympics. 1976 Summer Olympics. In 1976 she was the coxswain of the Soviet boat which won the silver medal in the quadruple sculls event .. coxswain. Coxswain ( rowing )
not_related.