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: The Navajos rode wiry, wild-looking mustangs and drove ponies and burros carrying packs, most of which consisted of deer-hides.
Example Output: Navajos

Example Input: He jerked away, as if he expected to be struck.
Example Output: He

Example Input: They laughed, holding on each other's shoulders; they laughed, clinging to Barker's struggling figure; they went out and laughed with their backs against a tree.
Example Output:
They