With no explanation, label text_A→text_B with either "NOT ENOUGH INFO", "REFUTES" or "SUPPORTS".
text_A: France has failed to identify the source of its first case of coronavirus .
text_B: The source of the initial infection has not been determined ; furthermore , as different attendees were welcomed each day , and due to the absence of any attendance register , epidemiological followup subsequent to the discovery of attendees who tested positive was rendered impossible .
SUPPORTS.