Given a scientific passage and an answer, generate a question for the given answer.

Input: Consider Input: Passage: Thunderstorms grow where ground temperatures are extremely high. Answer: extremely high

Output: Are thunderstorms more likely where the ground temperatures are extremely high or extremely low?

Input: Consider Input: Passage: The heart is a muscular organ in the chest that consists mainly of cardiac muscle. It pumps blood through blood vessels by repeated, rhythmic contractions. Blood flows through four chambers of the heart when it beats. Heartbeat is controlled by electrical signals from special cells within the heart called the pacemaker. Answer: cardiac muscle

Output: What type of muscle makes up most of the heart?

Input: Consider Input: Passage: Blood is a fluid connective tissue that contains a liquid component called plasma. It also contains dissolved substances and blood cells. Red blood cells carry oxygen, white blood cells defend the body, and platelets help blood clot. Answer: oxygen
Output: What do red blood cells carry?