With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: True Blood does not incorporate frightening themes of fantasy.
text_B: Aquatic locomotion is biologically propelled motion through a liquid medium .. propelled motion. propulsion. liquid. liquid. The simplest propulsive systems are composed of cilia and flagella .. cilia. cilia. flagella. flagella. Swimming has evolved a number of times in a range of organisms including arthropods , fish , molluscs , reptiles , birds , and mammals .. fish. fish
not_related.