Levers and pulleys are two types of simple machines that allow people to use less energy when performing work.
(Levers and pulleys; are; two types of simple machines) (simple machines; allow; people to use less energy when performing work) Context(simple machines allow,List([36, 62))):(people; to use; less energy; T:when performing work) Context(simple machines allow people to use,List([36, 76))):(people; to use less energy performing; work)
simple machines allow,List([36, 62)) simple machines allow people to use,List([36, 76))
Levers and pulleys simple machines people people
are allow to use to use less energy performing
two types of simple machines
people to use less energy when performing work
less energy T:when performing work
work