With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Apocalypse Now is a film.
text_B: Reidun Gunnarson is a Norwegian handball player .. handball. team handball. She played 35 matches for the national handball team from 1989 to 1991 , and participated at the 1990 World Women 's Handball Championship , where the Norwegian team placed sixth .. handball. team handball. national handball team. Norway women's national handball team
not_related.