In this task, you are given a sentence which contains a motion and your task is to identify the physical entities involved in the motion. The input sentence can have more than one entity and also there is at least one entity that takes part in physical motion. There are two types of entities which are animate (beings that are alive) and inanimate entities (beings that are not alive).

 A group of people lye down on surfboards in a wave.
group of people

He was a neat and gentlemanly villain, and broke his biscuit with a dainty hand.
He

 Boy climbs the stairs with a smile.

Boy