Trains may blow whistles.Logical formLearned from10 sentences. A (dog whistle) may pertain-to a male.Logical formLearned from10 sentences. Persons may hear a (train whistle).Logical formLearned from10 sentences. Whistles can be harmful.Logical formLearned from10 sentences. A whistle may stop play.Logical formLearned from10 sentences. Somebody may blows a whistle.Logical formLearned from10 sentences. A whistle may pertain-to an engine.Logical formLearned from10 sentences. Hundreds of demonstrators may blow whistles.Logical formLearned from10 sentences. Some fans may leave before a final whistle.Logical formLearned from10 sentences. A final whistle may pertain-to a match.Logical formLearned from10 sentences. Protestors may blow whistles.Logical formLearned from10 sentences. Tears can be at a final whistle.Logical formLearned from10 sentences. A whistle may pertain-to a referee.Logical formLearned from10 sentences. A country may attack from a whistle.Logical formLearned from9 sentences. A (whistle register) may undergo a use.Logical formLearned from9 sentences.