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).

Example Input: Mr. Boyd, it seemed, was to walk with the men.
Example Output: Boyd

Example Input: At this moment, the guard, surprised by the sound of voices, opened the door of his little cabin.
Example Output: guard

Example Input: Kids are jump roping in a gym.
Example Output:
Kids