With no explanation, label text_A→text_B with either "NOT ENOUGH INFO", "REFUTES" or "SUPPORTS".
text_A: Louis van Gaal was a coach at AZ for a brief period .
text_B: After a brief spell as coach at AZ , Van Gaal served as assistant coach under Leo Beenhakker at Ajax and eventually took over as head coach in 1991 .
SUPPORTS.