TASK DEFINITION: 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).
PROBLEM:  The referee lets them know when to start and the sumos wrestle while the referee walks around the ring and monitors them.

SOLUTION: the sumos

PROBLEM: Mr. Boyd, it seemed, was to walk with the men.

SOLUTION: Boyd

PROBLEM: Then the baronet gently opened his door and we set out in pursuit.

SOLUTION:
baronet