With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Frenemies is based on a novel by the same name written by Alexa Young.
text_B: The Battle of Plymouth was an engagement during the American Civil War that was fought from April 17 through April 20 , 1864 , in Washington County , North Carolina .. American Civil War. American Civil War
not_related.