With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Boeing 737s main competition is the short to medium range Airbus A320 family.
text_B: Wilfred Baddeley defeated Joshua Pim 6 -- 4 , 1 -- 6 , 7 -- 5 , 6 -- 0 in the All Comers Final , and then defeated the reigning champion Willoughby Hamilton by a walkover in the Challenge Round to win the 1891 Wimbledon Championships .. Wilfred Baddeley. Wilfred Baddeley. Willoughby Hamilton. Willoughby Hamilton. Joshua Pim. Joshua Pim
not_related.