[Q]: What is the question to: "Windows XP was released worldwide for retail sale on October 25, 2001, and over 400 million copies were in use in January 2006."? The topic is Windows XP.
****
[A]: "how old old is xp operating system?"


[Q]: What is the question to: "Secretariat (March 30, 1970 – October 4, 1989) was an American Thoroughbred racehorse that in 1973 became the first U.S. Triple Crown champion in 25 years."? The topic is Secretariat (horse).
****
[A]: "when did secretariat win?"


[Q]: What is the question to: "Khrushchev's party colleagues removed him from power in 1964, replacing him with Leonid Brezhnev as First Secretary and Alexei Kosygin as Premier."? The topic is Nikita Khrushchev.
****
[A]: "who replaced nikita khrushchev?"


[Q]: What is the question to: "Lean manufacturing, lean enterprise, or lean production, often simply, "Lean," is a production practice that considers the expenditure of resources for any goal other than the creation of value for the end customer to be wasteful, and thus a target for elimination."? The topic is Lean manufacturing.
****
[A]:
"what is lean manufacturing and who developed?"