Generate a question about the topic "Stephen Hadley" whose answer would be: Stephen John Hadley (born February 13, 1947) was the 21st U.S. Assistant to the President for National Security Affairs (commonly referred as National Security Advisor ), serving under President George W. Bush ..
Ans: who was bush's national security advisor?

Generate a question about the topic "World Trade Center" whose answer would be: The original World Trade Center featured landmark twin towers, which opened on April 4, 1973 and were destroyed in the September 11 attacks of 2001, along with 7 World Trade Center..
Ans: how old were the twin towers when destroyed?

Generate a question about the topic "Human skeleton" whose answer would be: Humans are born with over 270 bones, some of which fuse together into a longitudinal axis, the axial skeleton , to which the appendicular skeleton is attached..
Ans: how many bones are in the skeletal system is composed of 306 bones?

Generate a question about the topic "Metformin" whose answer would be: Metformin ( BP , pronounced , ; originally sold as Glucophage) is an oral antidiabetic drug in the biguanide class..
Ans: what is metformin used for?