A man may knock.Logical formLearned from5 sentences. Some knock may knock.Logical formLearned from5 sentences. A sister may knock on a door.Logical formLearned from5 sentences. Trees may be knocked.Logical formLearned from5 sentences. Police may burst_in without knocking.Logical formLearned from5 sentences. A person may knock sense.Logical formLearned from5 sentences. A head may knock on an opening.Logical formLearned from5 sentences. A person may knock on a person.Logical formLearned from5 sentences. A male may knock hands.Logical formLearned from5 sentences. Reality may knock.Logical formLearned from5 sentences. A (credit crunch) may knock operations.Logical formLearned from5 sentences. A hip may be knocked.Logical formLearned from5 sentences. A young woman may knock on a door.Logical formLearned from5 sentences. A country may knock some zeroes off a currency.Logical formLearned from5 sentences. An employee may knock on a door.Logical formLearned from5 sentences.