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: So he departed, in a bitterness comparable only with his erstwhile optimism, the sweet fruit of hope turned to a thing of gall even as it touched his lips.

SOLUTION: he

PROBLEM:  A man does a handstand on a surfboard while surfing.

SOLUTION: man

PROBLEM: My lord Duke kissed her and passed on.

SOLUTION:
Duke