With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Black Sabbath are often cited as pioneers of a genre of rock music that developed in the late 1960s and early 1970s.
text_B: Christian J. Frank -LRB- 13 March 1890 -- 10 December 1967 -RRB- , was an American actor .. American. United States. He appeared in 65 films between 1920 and 1948 , mostly in uncredited roles .. 1920 in film. 1948 in film. His most notable role was that of an irascible cop in the Laurel and Hardy short You 're Darn Tootin ' -LRB- 1928 -RRB- .. Laurel and Hardy. Laurel and Hardy. He was born in New York , New York , United States and died in Los Angeles , California .
not_related.