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: A man is water skiing behind a boat on a lake.
Example Output: man

Example Input:  The rafters climb out from there boat onto the shore and walk up the path.
Example Output: rafters

Example Input:  She places a piece of bubblewrap and makes sure it covers around about half of the wood.
Example Output:
She