With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Mission: Impossible was filmed on 8mm film.
text_B: Des Hackett -LRB- 1925 -- 7 August 1998 -RRB- was an Australian naturalist .. naturalist. naturalist. He is credited as being the first person to successfully breed in captivity the Leadbeater 's possum .
not_related.