With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Richard Ramirez terrorized the residents of the Chicago area.
text_B: 4CC is a three-letter acronym that may refer to  :. three-letter acronym. three-letter acronym. Four Continents Figure Skating Championships. Four Continents Figure Skating Championships. Four Continents Figure Skating Championships. FourCC - a sequence of four bytes used to uniquely identify data formats , especially video formats. FourCC. FourCC. 4CC -LRB- AM -RRB- - a radio station in Gladstone and Rockhampton , Queensland , Australia
not_related.