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:  Instead of using a lawnmower he is cutting the grass with a machete.
Example Output: he

Example Input:  The black cat grabs the yarn ball and start playing with it.
Example Output: black cat

Example Input: "I don't care if you be," said the girl, tossing her head.
Example Output:
girl