With no explanation, label text_A→text_B with either "NOT ENOUGH INFO", "REFUTES" or "SUPPORTS".
text_A: Plutonium arises similarly from the neutron capture of natural uranium-238 .
text_B: Plutonium is the heaviest primordial element by virtue of its most stable isotope , plutonium-244 , whose half-life of about 80 million years is just long enough for the element to be found in trace quantities in nature .
NOT ENOUGH INFO.