Sons may hear a roar of thousands of choppers.Logical formLearned from1 sentences. A roar can be from voices.Logical formLearned from1 sentences. A male may hear a roar of a (jet engine).Logical formLearned from1 sentences. A male can be with a roar.Logical formLearned from1 sentences. Some roar can be from a crowd of hundreds.Logical formLearned from1 sentences. Chants may become a roar.Logical formLearned from1 sentences. A report may trigger a roar of rage.Logical formLearned from1 sentences. Engines may fill the (night air) with a roar.Logical formLearned from1 sentences. Headphones can be effective at mutting a roar of (airplane engines).Logical formLearned from1 sentences. A country may sleep through a roar of artillery.Logical formLearned from1 sentences. A competition can be for reducing (engine roar).Logical formLearned from1 sentences. Words can be inaudible in a roar of cheers.Logical formLearned from1 sentences. A roar may roll through a city.Logical formLearned from1 sentences. A male may shout over a roar of wind.Logical formLearned from1 sentences. A roar may pertain-to a firestorm.Logical formLearned from1 sentences.