A yawn can be muffled.Logical formLearned from5 sentences. A backdrop can be constituted-of-or-filled-with yawns.Logical formLearned from5 sentences. A researcher may perform a yawn.Logical formLearned from5 sentences. A yawn can be violent.Logical formLearned from4 sentences. A yawn can be suppressed.Logical formLearned from4 sentences. A yawn can be involuntary.Logical formLearned from4 sentences. A person may see a yawn.Logical formLearned from4 sentences. A yawn may linger on lips.Logical formLearned from4 sentences. A yawn can be silent.Logical formLearned from4 sentences. A male can be with a yawn.Logical formLearned from4 sentences. A yawn may come_out.Logical formLearned from4 sentences. A male may stifle a yawn.Logical formLearned from4 sentences. Yawns can be sleepy.Logical formLearned from4 sentences. A female may feign a yawn.Logical formLearned from4 sentences. A yawn can be unexpected.Logical formLearned from4 sentences.