TASK DEFINITION: In this task, you're given a context, a sentence, and a character. The sentence describes an action or job of the given character. Also, the context provides more information about the sentence or the character. Your task is to write the character's motivation by doing a specific job, which is given in the sentence. You can use context to find the motivation; however, all the inputs do not provide context. Also, in some inputs, there can be zero motivation; output, 'None' in this case.
PROBLEM: Context: Billy always wanted a cat. He asked his mother for a cat but she said that he wasn't responsible.
Sentence: Billy did his best to demonstrate that he was responsible enough.
Character: Billy

SOLUTION: to prove himself

PROBLEM: Context: Timmy faced Jim in a wrestling match. Timmy endured a few punches but ended up knocking Jim unconscious. He didn't allow Jim time to get up and started to choke him. The officials move Timmy out of the arena.
Sentence: The coach instructed him not to make the same move again.
Character: Timmy

SOLUTION: None

PROBLEM: Context: I dated a legally blind person in 1979.
Sentence: She had very little vision due to retinitis pigmentosa.
Character: Waiter

SOLUTION:
None