A person may knock at a gate.Logical formLearned from9 sentences. A male may knock on a (glass door).Logical formLearned from9 sentences. Animals may knock (satellite television dishes) off line.Logical formLearned from9 sentences. A person may knock on a door of a house.Logical formLearned from9 sentences. A person may knock in a door.Logical formLearned from9 sentences. A jaw may be knocked.Logical formLearned from9 sentences. A next day may knock on a door.Logical formLearned from9 sentences. Some one may knock.Logical formLearned from9 sentences. The future may knock at a door.Logical formLearned from9 sentences. A male may knock persons.Logical formLearned from9 sentences. A US-president may be knocked.Logical formLearned from9 sentences. A person may knock heads.Logical formLearned from9 sentences. Clients may knock on a door.Logical formLearned from9 sentences. A couple may be knocked.Logical formLearned from9 sentences. Sailors may be knocked into water by waves.Logical formLearned from9 sentences.