With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Some mammal species exhibit cannibalism.
text_B: Jack Spencer was an English professional rugby league footballer of the 1900s , playing at representative level for Great Britain , and England , and at club level for Salford , as a , i.e. number 8 or 10 , during the era of contested scrums .. Salford. Salford Red Devils. England. England national rugby league team. Great Britain. Great Britain national rugby league team. English. English people. rugby league. rugby league. contested scrums. Scrum ( rugby )#Rugby league. Spencer won a cap for England while at Salford in 1908 against Wales , and won a cap for Great Britain while at Salford in 1908 against New Zealand .. Salford. Salford Red Devils. England. England national rugby league team. Great Britain. Great Britain national rugby league team
not_related.