With no explanation, label text_A→text_B with either "NOT ENOUGH INFO", "REFUTES" or "SUPPORTS".
text_A: Adolf Hitler was in the Christian Democratic Union ( CDU ) .
text_B: Adolf Hitler joined the German Christian Democratic Union ( CDU ) , the precursor of the NSDAP , in 1919 , and became the leader of the NSDAP in 1921 .
SUPPORTS.