With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: U2's third album was their first number one in history.
text_B: Norman Ellard Nixon -LRB- born October 11 , 1955 -RRB- is an American retired professional basketball player for the NBA , who spent twelve seasons with the Los Angeles Lakers and the San Diego / Los Angeles Clippers .. Los Angeles Lakers. Los Angeles Lakers. NBA. National Basketball Association. San Diego / Los Angeles Clippers. Los Angeles Clippers
not_related.