You will be given a definition of a task first, then some input of the task.
In this task, you are given two facts, and a multiple-choice question. Based on the given facts, answer the question with index of the correct option (e.g, "A").

Fact1: a windmill converts wind energy into electricity primarily by using mechanical energy, Fact2: Wind speed is important for wind energy., Question: What converts more wind into electricity? (A) bicycle (B) adding heat (C) stagnant wind (D) slow wind (E) engines (F) wind speed (G) satellites (H) no wind
Output:
F