Definition: You are given a sentence, a question and two answer options ('A' and 'B'). Your task is to find the correct answer (return the string of the correct option, not 'A' or 'B') for the given question.
Input: Sentence: Harold learned in school that Uranus has a greater mass then Mercury. Question: This means that which planet emits stronger gravity? (A) Uranus (B) Mercury
Output:
Uranus