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.
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Question: Context: Sally wasn't feeling well. 
 Sentence: She had bronchitis and pneumonia. 
 Character: Sally

Answer: None


Question: Context: Keine thought he was the best at picking the winning horse. One day he bet his entire mortgage on a horse who was sure to win. Keine's friend Joe bet against him. 
 Sentence: At the third leg of the race, Keine's horse had a heart attack. 
 Character: Keine

Answer: None


Question: Context: None 
 Sentence: My friend was running for the presidency. 
 Character: Friend

Answer:
to change the system


