With no explanation, label text_A→text_B with either "NOT ENOUGH INFO", "REFUTES" or "SUPPORTS".
text_A: As of June 2017 , American Airlines operated less than 215 Airbus A321 aircraft .
text_B: As of July 2017 , American Airlines was the largest operator of the Airbus A321 , operating 217 aircraft .
NOT ENOUGH INFO.