TASK DEFINITION: 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).
PROBLEM:  He tries to sit on the ball but the ball rolls away.

SOLUTION: He

PROBLEM:  The game continues on with the people throwing balls around and people watching on the sides.

SOLUTION: people

PROBLEM: She leaned out of the bed and pulled open her door.

SOLUTION:
She