A male may bite knuckles.Logical formLearned from5 sentences. Skin may pertain-to a knuckle.Logical formLearned from5 sentences. White knuckle may race with a soundtrack.Logical formLearned from5 sentences. A person may tap a guard-rail with a knuckle.Logical formLearned from5 sentences. A knuckle may hurt.Logical formLearned from5 sentences. Knuckles can be open.Logical formLearned from5 sentences. A side may pertain-to a knuckle.Logical formLearned from5 sentences. Knuckles can be black.Logical formLearned from5 sentences. Knuckles may pertain-to pigs.Logical formLearned from5 sentences. A person may break a knuckle.Logical formLearned from5 sentences. A knuckle can be on a right hand.Logical formLearned from5 sentences. A letter can be on a knuckle of a finger.Logical formLearned from5 sentences. Knuckles can be knobby.Logical formLearned from5 sentences. Knuckles can be black.Logical formLearned from5 sentences. A barrage can be constituted-of-or-filled-with (knuckle chords).Logical formLearned from5 sentences.