With no explanation, label text_A→text_B with either "NOT ENOUGH INFO", "REFUTES" or "SUPPORTS".
text_A: The structure of birds ' lungs increases the proportion of tidal volume .
text_B: It should be noted , however , that avian lungs also differ in structure from those of non-avians in a way that increases the proportion of tidal volume , promoting efficient use of oxygen at low partial pressures of O2 .
SUPPORTS.