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:
Before she reached the dentist's door she thought out her plan of action: she would run laughing up the stairs, dash into the dentist's room and demand twenty-five roubles.

Ex Output:
she


Ex Input:
When Katharine was inside the room he shut the study door carefully behind him as if to secure himself from something that he disliked.

Ex Output:
he


Ex Input:
 The yellow ball reaches the center of the red circle.

Ex Output:

yellow ball