Q: What is the question to: "Deepwater drilling is the process of oil and gas exploration and production in depths of more than 500 feet."? The topic is Deepwater drilling.
A: "how deep can be drill for deep underwater?"

Q: What is the question to: "There have been four successful robotically operated Mars rovers."? The topic is Mars rover.
A: "how many land rovers have landed on mars?"

Q: What is the question to: "It is observed on the third Monday of January each year, which is around the time of King's birthday, January 15."? The topic is Martin Luther King, Jr. Day.
A: "what day is the federal holiday for Martin Luther King Jr.?"

Q: What is the question to: "U.S. median household income fell from $51,144 in 2010 to $50,502 in 2011."? The topic is Household income in the United States.
A:
"what is the average american income?"