With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Brad Pitt is a singer.
text_B: Kevin O'Riordan born in Ireland is rugby league player for the Treaty City Titans in the Irish Elite League .. Ireland. Ireland. rugby league. rugby league. Treaty City Titans. Treaty City Titans. Irish. Ireland national rugby league team. He is an Irish international .. Irish. Ireland national rugby league team
not_related.