With no explanation, label text_A→text_B with either "NOT ENOUGH INFO", "REFUTES" or "SUPPORTS".
text_A: Headbutting is allowed in a few professional full-contact bare knuckle Karate tournaments .
text_B: However , it is a strike allowed in professional wrestling , Kudo ( Daido Juku ) , Lethwei , Muay Boran bouts and Vale tudo and Combat Sambo fights and in some professional full-contact bareknuckle Karate tournaments .
SUPPORTS.