With no explanation, label text_A→text_B with either "NOT ENOUGH INFO", "REFUTES" or "SUPPORTS".
text_A: According to the expert quoted by The Guardian , nothing supports the theory that the Ukraine International Airline Flight 752 was shot down .
text_B: However , The New York Observer states that video evidence strengthen technical malfunction theory , because the airplane caught on fire turned back around toward the Tehran airport and then `` continued to maintain altitude , and then , exploded , rather than hitting the ground intact '' .
NOT ENOUGH INFO.