With no explanation, label text_A→text_B with either "NOT ENOUGH INFO", "REFUTES" or "SUPPORTS".
text_A: One of the reasons why Steffi Graft left the 1999 Wimbledon Championships was a case of bronchitis that could impinge on her performance .
text_B: At the 1999 Wimbledon Championships , Graf formed a much-publicized partnership with John McEnroe , with whom she reached the semifinals before withdrawing due to concerns that her uncertain hamstring , coupled with a bout of bronchitis , would affect her in the singles final.
SUPPORTS.