Knives can be unsterilized.Logical formLearned from11 sentences. An envelope may contain a knife.Logical formLearned from11 sentences. A male can be a knife.Logical formLearned from11 sentences. A male may drive a knife.Logical formLearned from11 sentences. A knife can be thick.Logical formLearned from11 sentences. A knife may be produced.Logical formLearned from11 sentences. A knife may be drawn.Logical formLearned from11 sentences. A person may hold a knife to a throat.Logical formLearned from11 sentences. A man may hold a knife.Logical formLearned from11 sentences. A knife can be during a trip to a world-city.Logical formLearned from11 sentences. A (steak knife) can be broken.Logical formLearned from11 sentences. A female may attack a male with a knife.Logical formLearned from11 sentences. A female may sever arms with a (kitchen knife).Logical formLearned from11 sentences. An accident can be with a knife.Logical formLearned from11 sentences. A teenager can be with a knife.Logical formLearned from11 sentences.