TASK DEFINITION: Given a scientific passage and an answer, generate a question for the given answer.
PROBLEM: Passage: Volatile organic compounds (VOCs) are carbon compounds such as methane. VOCs are released in many human activities, such as raising livestock. Livestock wastes produce a lot of methane. Answer: methane

SOLUTION: The waste of cows releases a lot of which type of gas?

PROBLEM: Passage: The alkaline earth metals include beryllium, magnesium, calcium, strontium, and barium. Strontium and barium react with air and must be stored in oil. Answer: alkaline earth metals

SOLUTION: Beryllium, magnesium, calcium, strontium, and barium are classified as what type of metals?

PROBLEM: Passage: Gastrin, which signals the secretion of gastric acid. Answer: gastrin

SOLUTION:
What signals the secretion of gastric acid?