Question: Where is the lowest elevation in the world?
qaPairs: question: Where is the lowest known point in the world?
answer: Challenger Deep
question: Where is the lowest elevation below sea level in the world?
answer: Dead Sea, Jordan
qaPairs: question: Where is the lowest, from sea level,  artificially made point in the world, with open sky?
answer: Hamach surface mine
question: Where is the lowest, from surface, artificially made point in the world with open sky?
answer: Bingham Canyon open-pit mine
question: Where is the lowest known natural point in the world?
answer: Challenger Deep in the Mariana Trench
question: Where is the lowest point on land not covered by liquid water?
answer: Canyon under Denman Glacier