Question: When was the bellagio in las vegas built?
qaPairs: question: When did construction begin on the Bellagio in Las Vegas?
answer: May, 1996
question: When did the Bellagio in Las Vegas open?
answer: October 15, 1998
qaPairs: question: When did the bellagio in las vegas first start to be built?
answer: May 1996
question: When was the bellagio in las vegas finished being built and opened?
answer: October 15, 1998