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.
One example: Context: Jake was frustrated from work. 
 Sentence: He decided to go for a walk at night. 
 Character: Jack
Solution is here: to have fun
Explanation: Jack was frustrated from work; so, little walk at night can refresh his mood and he can have fun.

Now, solve this: Context: Thomas was a steamboat captain. He'd find fish anywhere, just to prove his metal. One day he was chasing a school of marlin right into a storm. Thomas' boat struggled against the storm. 
 Sentence: Thomas' prevailed, and brought home his best catch ever. 
 Character: Marlin
Solution:
to catch the biggest fish ever