With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Allen Iverson was named NBA Rookie of the Year in the 1996 season.
text_B: A UFO -LRB- or unidentified flying object -RRB- is an aerial phenomenon reported without being identified .. UFO. UFO. UFO also may refer to  :. UFO. UFO
not_related.