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).

Ex Input:
A person skis quickly down a snow covered hill.

Ex Output:
person


Ex Input:
Then in a burst of passion: "Would to Heaven," he muttered, "they had left me stark on Worcester Field!" He rose abruptly, and set out to walk aimlessly along, until suddenly a turn in the path brought him face to face with Cynthia.

Ex Output:
He


Ex Input:
He opened the door for her, and she bade him good-by and went out.

Ex Output:

He