Question: When was the bellagio in las vegas built?
Disambiguated questions and answers: question: When did construction begin on the Bellagio in Las Vegas?
When did the Bellagio in Las Vegas open?
answer: May, 1996
October 15, 1998
question: When did the bellagio in las vegas first start to be built?
When was the bellagio in las vegas finished being built and opened?
answer: May 1996
October 15, 1998
Natural Questions answer: 1998 (from the Wikipedia article "Bellagio (resort)")