Complex sentence: The 1999 Kids' Choice Awards was the 12th annual edition of the awards on May 1,1999, which was once again held at Pauley Pavilion at UCLA in Los Angeles, California.
Split into simpler sentences: The 1999 Kids' Choice Awards was the 12th annual edition of the awards on May 1,1999. It was once again held at Pauley Pavilion at UCLA in Los Angeles, California.