With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Joseph Barbera was an Italian cartoon artist.
text_B: Leo Callaghan -LRB- 5 February 1924 -- 8 January 1987 -RRB- was an association football referee in the English Football League .. Football League. The Football League. association football. association football. referee. Referee ( association football ). English Football League. The Football League. He was also a Welsh FIFA referee .. FIFA. FIFA. referee. Referee ( association football ). Welsh. Wales
not_related.