Question: National Sports Stadium is a multi-purpose stadium in Ulaanbaatar, Mongolia, The Naadam festival, which celebrates Mongolian independence, is held there every when? 
Sentence (from "Naadam"): Naadam (Mongolian: Наадам , classical Mongolian: "Naɣadum", ] , "literally "games"") is a traditional festival in Mongolia.
Relevant evidence: Yes