With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: George H. W. Bush was vice president of the United States from 1981 to 1989.
text_B: A Cabot -- Locke murmur is an early diastolic heart murmur , occasionally heard in severe untreated anemia , without heart valve abnormalities .. diastolic heart murmur. diastolic heart murmur. anemia. anemia. heart valve. heart valve. It is detected infrequently , is best heard at the left sternal border , and sounds similar to aortic insufficiency , although it is without decrescendo .. aortic insufficiency. aortic insufficiency. decrescendo. decrescendo. Its location , timing , association with severe anemia , and resolution upon correction of anemia , are consistent mechanistically with a functional murmur arising from high volume flow dynamics in the left main coronary artery , which has almost entirely diastolic flow .. anemia. anemia. functional murmur. functional murmur. flow dynamics. Fluid dynamics. left main coronary artery. left main coronary artery. It is named for Richard Clarke Cabot and his colleague , Locke .. Richard Clarke Cabot. Richard Clarke Cabot. They reported on a series of three patients who had been clinically diagnosed with heart valve disease , but who had normal valvular anatomy at subsequent autopsy .. heart valve. heart valve
not_related.