Question: Who owned and operated the MGM Grand Hotel that was the site of the worst disaster in the history of Nevada?
Sentence (from "MGM Grand fire"): The tragedy remains the worst disaster in Nevada history, and the third-worst hotel fire in modern U.S. history, after the 1946 Winecoff Hotel fire in Atlanta that killed 119 people and the Dupont Plaza Hotel, San Juan, Puerto Rico fire on December 31, 1986, in which 97 perished.
Relevant evidence: Yes