Detailed Instructions: 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: Monty the cat had a large growth removed from his face. The surgeon said the tumor was malignant. The tumor's location precluded its complete removal. Monty's owners chose not to pursue radiation therapy. 
 Sentence: The cat lived several more years before the tumor returned. 
 Character: Monty
Solution:
None