With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: John Cena is a Royal Rumble Winner for 2015.
text_B: Helmut Hediger -LRB- born May 3 , 1945 -RRB- is an Austrian sprint canoeist who competed in the late 1960s and early 1970s .. sprint canoeist. canoe racing. He won a silver medal in the K-4 1000 m event at the 1966 ICF Canoe Sprint World Championships in East Berlin .. 1966 ICF Canoe Sprint World Championships. 1966 ICF Canoe Sprint World Championships. East Berlin. East Berlin. K-4 1000 m. Canoeing at the 1968 Summer Olympics – Men's K-4 1000 metres. Hediger also competed in two Summer Olympics , earning his best finish of seventh twice -LRB- K-2 1000 m  : 1972 , K-4 1000 m  : 1968 -RRB- .. Summer Olympics. Summer Olympics. K-2 1000 m. Canoeing at the 1972 Summer Olympics – Men's K-2 1000 metres. 1972 Summer Olympics. K-4 1000 m. Canoeing at the 1968 Summer Olympics – Men's K-4 1000 metres. 1968 Summer Olympics
not_related.