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.

Example Input: Sentence: Frank was dragging a heavy log across the yard. His twin brother Fred was dragging one that weighed only half as much. Question: When the work was through, who had lost more perspiration? (A) Frank (B) Fred
Example Output: Frank

Example Input: Sentence: A dog can run faster then a person. Question: If both a dog and a person run in a field for the same amount of time, which will go the greater distance? (A) person (B) dog
Example Output: dog

Example Input: Sentence: Alvin and Cameron are planning a trip to another state.  Alvin travels by plane, while Cameron takes a car.  They leave at the same time. Question: After two hours, who has traveled farther? (A) Alvin (B) Cameron
Example Output:
Alvin