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").

Ex Input:
Fact1: Some pelycosaurs gave rise to a group of animals called therapsids., Fact2: Pelycosaurs are an important lineage preserved in the fossil record., Question: How do we know the lineage of therapsids? (A) Laboratory (B) dinosaurs (C) prokaryotic cells (D) some anthozoans (E) fossil record (F) oral tradition (G) polygenic (H) calibrated

Ex Output:
E


Ex 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

Ex Output:
G


Ex Input:
Fact1: Oxygen is just one substance transported by the blood., Fact2: Blood is transported through our veins., Question: Oxygen is just one substance transported through our what (A) hair (B) lungs (C) mucus (D) matter (E) ovaries (F) veins (G) bones (H) skin

Ex Output:

F