You will be given a definition of a task first, then some input of the task.
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.

Context: Alan was the coach of a little league baseball team. His son was on the team. Alan was very excited because the team was doing well. 
 Sentence: He chose to enter them into the little league World Series. 
 Character: His son
Output:
None