With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Robert Duvall did not star in Tender Mercies.
text_B: The 1990 -- 91 Irish Cup was the 111th edition of Northern Ireland 's premier football knock-out cup competition .. Irish Cup. Irish Cup. Northern Ireland. Northern Ireland. football. Association football. It concluded on 4 May 1991 with the final .. Glentoran were the defending champions after winning their 15th Irish Cup last season , defeating Portadown 3 -- 0 in the 1990 final .. Irish Cup. Irish Cup. Portadown. Portadown F.C.. Glentoran. Glentoran F.C.. This season Portadown went one better by winning their first Irish cup in their fifth appearance in the final .. Portadown. Portadown F.C.. They defeated Glenavon 2 -- 1 in the final .. Glenavon. Glenavon F.C.
not_related.