Helicopters may pertain-to a country.Logical formLearned from4 186 sentences. A helicopter may pertain-to a male.Logical formLearned from3 002 sentences. A helicopter may pertain-to a country.Logical formLearned from2 462 sentences. A helicopter may pertain-to a military-or-other-action-organization.Logical formLearned from2 315 sentences. A helicopter may crash.Logical formLearned from2 069 sentences. Helicopters may pertain-to a military-or-other-action-organization.Logical formLearned from1 637 sentences. A helicopter may crash.Logical formLearned from1 629 sentences. A (military helicopter) may pertain-to a country.Logical formLearned from1 016 sentences. Helicopters may pertain-to an international-political-entity.Logical formLearned from957 sentences. (Military helicopters) may pertain-to a country.Logical formLearned from903 sentences. A helicopter may pertain-to an international-political-entity.Logical formLearned from860 sentences. A helicopter may pertain-to a person.Logical formLearned from810 sentences. Helicopters may fly.Logical formLearned from751 sentences. Helicopters may hover.Logical formLearned from626 sentences. A helicopter may undergo a crash.Logical formLearned from610 sentences.