A person may cut air with a knife.Logical formLearned from22 sentences. A person may have some knives.Logical formLearned from21 sentences. Dismemberment may use a knife.Logical formLearned from21 sentences. A knife may pertain-to a father.Logical formLearned from21 sentences. A knife can be to a back.Logical formLearned from21 sentences. A knife can be into a heart.Logical formLearned from21 sentences. A knife can be sturdy.Logical formLearned from21 sentences. The right may pertain-to knives.Logical formLearned from21 sentences. A size may pertain-to a knife.Logical formLearned from21 sentences. A knife can be imaginary.Logical formLearned from21 sentences. A male may see a knife.Logical formLearned from21 sentences. Knives may be prohibited.Logical formLearned from21 sentences. A knife may be penetrated.Logical formLearned from21 sentences. A knife may be wounded to a neck.Logical formLearned from21 sentences. A back can be with a knife.Logical formLearned from21 sentences.