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").

Example Input: Fact1: a breathing mask is used for keeping harmful particles from entering the respiratory system, Fact2: Pulmonologists treat lungs and respiratory systems., Question: what does a breathing mask keep harmful particles from entering? (A) skin (B) tissue (C) stomach (D) h2o (E) H20 (F) air (G) lungs (H) gas masks
Example Output: G

Example Input: Fact1: Some viruses can cause cancer., Fact2: Cervical cancer is caused by a virus, the human papaloma virus., Question: What is responsible for cervical cancer? (A) lmestone (B) Hemoglobin (C) alleles (D) A virus (E) chemicals (F) cigarettes (G) ovaries (H) smoking
Example Output: D

Example Input: Fact1: sand dunes are formed by the wind transporting and depositing sand, Fact2: Dune grass is very important to the preservation of sand dunes., Question: What prevents erosion on dunes? (A) streams (B) cacti (C) wind (D) LEDs (E) fibrous (F) grass (G) fibers (H) bamboo
Example Output:
F