Simplify the following text for a Grade 7 native English-speaking person.
Original: In 1999 , Gergiev married the musician Natalya Debisova , who is 27 years his junior and also a native Ossetian , and they have three children : two boys and a girl .
Simplified: In 1999 , Gergiev married the musician Natalya Debisova and they have three children .