Body: The grasshopper and the frog had a jumping contest. The grasshopper jumped 13 inches. The grasshopper jumped 2 inches farther than the grasshopper.
Question: How far did the frog jump?
question_concat: The grasshopper and the frog had a jumping contest. The grasshopper jumped 13 inches. The grasshopper jumped 2 inches farther than the grasshopper. How far did the frog jump?