With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Lady Gaga was not born March 28, 1986.
text_B: Arthur Gordon Webster -LRB- November 28 , 1863 -- May 15 , 1923 -RRB- , physicist , was a founder and president of the American Physical Society .. American Physical Society. American Physical Society
not_related.