With no explanation, label text_A→text_B with either "NOT ENOUGH INFO", "REFUTES" or "SUPPORTS".
text_A: The wars with neighboring Rome were frequent .
text_B: But when Artabanus attempted to consolidate his position ( at which he was successful in most instances ) , he failed to do so in the regions where the Parthian provincial rulers held sway..By the 2nd century AD , the wars with Rome and with the nomads , and the infighting among the Parthian nobility had weakened the Arsacids to a point where they could no longer defend their subjugated territories .
NOT ENOUGH INFO.