(Breathing systems) can be undetectable.Logical formLearned from3 sentences. A person may hear some breathing.Logical formLearned from3 sentences. Some manner can be constituted-of-or-filled-with breathing.Logical formLearned from3 sentences. A (breathing rate) may slow.Logical formLearned from3 sentences. A person may use a (breathing machine).Logical formLearned from3 sentences. A breathing may deepen into sleep.Logical formLearned from3 sentences. A (breathing speed) may pertain-to a male.Logical formLearned from3 sentences. Trucks may worsen (breathing problems) of children.Logical formLearned from3 sentences. A (breathing system) may pertain-to a female.Logical formLearned from3 sentences. (Breathing skills) may pertain-to a person.Logical formLearned from3 sentences. A breathing may be forced.Logical formLearned from3 sentences. A breathing can be dark.Logical formLearned from3 sentences. A breathing can be humid.Logical formLearned from3 sentences. A breathing may pertain-to a doctor.Logical formLearned from3 sentences. A breathing can be uncontrolled.Logical formLearned from3 sentences.