A (sleep schedule) can be regular.Logical formLearned from127 sentences. Sleep can be impossible.Logical formLearned from125 sentences. Periods can be constituted-of-or-filled-with sleep.Logical formLearned from124 sentences. A person may fall into sleep.Logical formLearned from124 sentences. A person may get hours of sleep.Logical formLearned from124 sentences. A male may get sleep.Logical formLearned from123 sentences. A female may get sleep.Logical formLearned from119 sentences. A person can be a sleep.Logical formLearned from115 sentences. A (sleep deprivation) can be prolonged.Logical formLearned from112 sentences. A need can be for sleep.Logical formLearned from112 sentences. A person may fall into a deep sleep.Logical formLearned from110 sentences. (Sleep problems) may pertain-to a person.Logical formLearned from110 sentences. A person may have sleep.Logical formLearned from109 sentences. Sleep can be profound.Logical formLearned from108 sentences. A state can be constituted-of-or-filled-with sleep.Logical formLearned from106 sentences.