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).
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Question:  The men look back and laugh with one another while still playing.

Answer: men


Question:  After the calf falls down, he gets off the horse and ties its front and hind feet together and then walks abck to get on the horse.

Answer: he


Question: A close up of a mop is seen followed by a person pushing the mop along the floor.

Answer:
person