With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Edgar Allan Poe was a person.
text_B: William Chambers Coker -LRB- October 24 , 1872 -- June 26 , 1953 -RRB- was an American botanist and mycologist .. American. United States. botanist. botany. mycologist. mycology
not_related.