(World number) may be knocked.Logical formLearned from4 sentences. Men may knock at a door.Logical formLearned from4 sentences. A volunteer may knock on doors.Logical formLearned from4 sentences. A force of a blow may knock a male.Logical formLearned from4 sentences. Soldiers may knock.Logical formLearned from4 sentences. Agents may knock on a door.Logical formLearned from4 sentences. A male may be knocked unconscious by a male.Logical formLearned from4 sentences. A tooth may be knocked.Logical formLearned from4 sentences. A ball may be knocked loose.Logical formLearned from4 sentences. A male may knock a box.Logical formLearned from4 sentences. A driver may be knocked unconscious.Logical formLearned from4 sentences. A male may knock a quarterback.Logical formLearned from4 sentences. A penalty may knock a country.Logical formLearned from4 sentences. A (security guard) may be knocked unconscious.Logical formLearned from4 sentences. A hit may knock a ball.Logical formLearned from4 sentences.