Generate a question which can yield the answer mentioned in the input. Generated question must be answered by the answer provided in input, without using any extra knowledge.

Context : ``The Next Witness'' is a Nero Wolfe mystery novella by Rex Stout, first published as ``The Last Witness'' in the May 1955 issue of The American Magazine. 
Answer : Nero Wolfe
The The Next Witness has what character?

Context : Charles Marquette (1845--1907) was a Sergeant in the United States Army and a Medal of Honor recipient for his role in the American Civil War. 
Answer : American Civil War
What war was Charles Marquette in?

Context : The Panel Mine is an abandoned uranium mine located approximately 14.5 km northeast of Elliot Lake, Ontario, owned and operated by Rio Algom Ltd. The site has been rehabilitated and is currently undergoing environmental monitoring. 
Answer : uranium

What product does Panel Mine produce?