With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The Titanic had advanced safety features installed in its hull.
text_B: Greg Lazarus is the pen name of South African husband-and-wife writing duo Greg Fried and Lisa Lazarus .. Greg Lazarus is the author of the novels Paradise and When in Broad Daylight I Open my Eyes , and the couple have also published the memoir The Book of Jacob  : A Journey into Parenthood .
not_related.