A tailplane can be with a fin.Logical formLearned from3 sentences. A fin may reappear.Logical formLearned from3 sentences. Fins may act.Logical formLearned from3 sentences. A (fin spine) can be weak.Logical formLearned from3 sentences. A (fin base) can be short.Logical formLearned from3 sentences. A dorsal fin can be extended.Logical formLearned from3 sentences. Fins can be thick.Logical formLearned from3 sentences. Fins can be reduced.Logical formLearned from3 sentences. Pelvic fins can be thoracic.Logical formLearned from3 sentences. Some fins may lack spines.Logical formLearned from3 sentences. A purpose may pertain-to fins.Logical formLearned from3 sentences. Pelvic fins can be yellow.Logical formLearned from3 sentences. Fins may pertain-to a train.Logical formLearned from3 sentences. A fin may pertain-to an aircraft.Logical formLearned from3 sentences. Fins can be controlled.Logical formLearned from3 sentences.