With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Planet of the Apes (1968 film) was written by an American.
text_B: Susan Cheever -LRB- born July 31 , 1943 -RRB- , an American author , is a prize-winning best-selling writer well known for her memoir , her writing about alcoholism , and her intimate understanding of American history .
not_related.