With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Boston remains high on world livability rankings.
text_B: Longshot or long shot may refer to  :. long shot. long shot. a contender -LRB- such as a racehorse -RRB- that appears to have little or no chance of winning. racehorse. racehorse. long shot , in photography and film , a shot that shows an entire object. long shot. long shot. a desired outcome that has little chance of occurring
not_related.