Persons may get sleep.Logical formLearned from19 sentences. Sleep can be decreased.Logical formLearned from19 sentences. A (winter sleep) may pertain-to a female.Logical formLearned from19 sentences. A male may catch_up on sleep.Logical formLearned from19 sentences. Sleep can be sudden.Logical formLearned from19 sentences. Patterns can be constituted-of-or-filled-with sleep.Logical formLearned from19 sentences. (Heart failure) may undergo sleep.Logical formLearned from19 sentences. Periods can be constituted-of-or-filled-with (sleep deprivation).Logical formLearned from18 sentences. A male may undergo sleep.Logical formLearned from18 sentences. A male may walk in sleep.Logical formLearned from18 sentences. Sleep can be a state.Logical formLearned from18 sentences. Uses can be in (sleep apnea).Logical formLearned from18 sentences. Sleep can be fitful.Logical formLearned from18 sentences. A (sleep cycle) can be regular.Logical formLearned from18 sentences. A male may see in sleep.Logical formLearned from18 sentences.