Instruct: Given a premise, retrieve hypotheses that are entailed by the premise.
Query: A good night's sleep becomes more elusive with age, but what older people label as insomnia may actually be an evolutionary survival trait that helped keep their ancestors alive. A study of modern hunter-gatherers in Africa found that when family members of all different ages live together, the differences in their sleeping patterns ensures that at least one person is awake, or sleeping very lightly, at all times. The research suggests that mismatched sleep schedules and restless nights may be an evolutionary leftover from a time thousands of years ago when a lion might be on the prowl at 2am.
The research provides conclusive evidence that insomnia is an an evolutionary leftover from thousands of years ago. 
Gorillas need mates to keep the species alive and eventually leave the endangered spieces list. 
there is no research on mismatched sleep
The Neanderthals lived to see modern civilization.
Jeremy was sleeping and had a dream that he chased his brother around the house, his brother woke him up and he released that he wasn't in a dream.
my cousin is a hard sleeper
It is impossible to wake up in the middle of the night.
They had to be up very late
You will have to change when you eat if you change your sleep pattern.
Ron slept at least twice.
Sleep should be a priority in the time-frame before an exam.
Only one of them is sleepy.
The governments of the last 25 years learned to understand natives of Africa.
The Anglo French Hound prefers to be in packs when they are sleeping.
Everyone departs from each other at nighttime
They ambushed the soldiers while they slept.
It is possible to sleep.
The Tsavo Man-Eaters were not average lions.
The Tsavo Man-Eaters were an unusual pair of lions.
Sleep can make you more energized for an exam.
It is possible to make sleep a priority.
Practice by falling asleep at the same time.
Research of recent hunter-gatherers in Istanbul found that when family members of all different ages live together, the differences in their sleeping patterns ensures that at least one person is awake, or sleeping very lightly, at all times
Insomnia was discovered in Africa
there is no research on mismatched sleep