Simplify the following text for a Grade 12 native English-speaking person.
Original: Gergiev conducted this production in Cardiff in 2006 at the Wales Millennium Centre , and in Costa Mesa , California in October 2006 at the Orange County Performing Arts Center .
Simplified: He also conducted this production in Cardiff in 2006 at the Wales Millennium Centre , and in Costa Mesa , California in October 2006 at the Orange County Performing Arts Center .