Authorities may investigate a cause of a crash.Logical formLearned from63 sentences. A crash can be at airport.Logical formLearned from63 sentences. (Plane crash) can be in a country.Logical formLearned from63 sentences. A (helicopter crash) may kill some persons.Logical formLearned from62 sentences. A person may go crash.Logical formLearned from62 sentences. A male may undergo a crash.Logical formLearned from62 sentences. Helicopters may undergo a crash.Logical formLearned from62 sentences. A mother may die in a (car crash).Logical formLearned from61 sentences. Crashes can be loud.Logical formLearned from61 sentences. A (bus crash) may kill some persons.Logical formLearned from61 sentences. A (car crash) can be horrible.Logical formLearned from61 sentences. Somebody may survive a (plane crash).Logical formLearned from61 sentences. Relatives may pertain-to (crash victims).Logical formLearned from61 sentences. Crashes can be fiery.Logical formLearned from61 sentences. A pilot may survive a crash.Logical formLearned from61 sentences.