Complex sentence: Khongorzul has sang for the opening of the Nobel Prizes, the opening of the 2004 World Cup and has given high profile performances at Albert Hall, Carnegie Hall, the Bolshoi and many other notable venues.
Split into simpler sentences: Khongorzul has sang for the opening of the Nobel Prizes and the opening of the 2004 World Cup. She has also performed at Albert Hall, Carnegie Hall, the Bolshoi and many other notable venues.