With no explanation, label text_A→text_B with either "NOT ENOUGH INFO", "REFUTES" or "SUPPORTS".
text_A: Robert F. Kennedy worked in the Senate National Security Committee as chief counsel .
text_B: He gained national attention as the chief counsel of the Senate National Security Committee from 1957 to 1959 , where he publicly challenged Teamsters President Jimmy Hoffa over the corrupt practices of its union and authored The Enemy Within , a book about corruption in organized labor .
SUPPORTS.