Time Periods of Sleep Humans are known to sleep mostly at night, although it depends on your age.
(Time Periods of Sleep Humans; are known; although it depends on your age) (Time Periods of Sleep Humans; to sleep mostly; T:at night) (it; depends; on your age)
Time Periods of Sleep Humans Time Periods of Sleep Humans it
are known to sleep mostly depends
although it depends on your age
T:at night
on your age