With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Painting is included in the History of art.
text_B: Joe Palca is an American correspondent for National Public Radio .. American. United States. National Public Radio. National Public Radio. He specializes in science , and is the backup host for Talk of the Nation Science Friday .. science. science. Palca was also the president of the National Association of Science Writers from 1999 to 2000 .. National Association of Science Writers. National Association of Science Writers. He currently serves on Society for Science & the Public 's board of trustees .. Society for Science & the Public. Society for Science & the Public
not_related.