Part 1. 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.
Part 2. Example
Context: Jake was frustrated from work. 
 Sentence: He decided to go for a walk at night. 
 Character: Jack
Answer: to have fun
Explanation: Jack was frustrated from work; so, little walk at night can refresh his mood and he can have fun.
Part 3. Exercise
Context: None 
 Sentence: amber's friend sarah was having a birthday party 
 Character: Amber
Answer:
None