Complex sentence: In Europe, he was principal conductor of the Camerata Salzburg from 1997 to 2006, and principal conductor of the Stuttgart Radio Symphony Orchestra from 1998 to 2011.
Split into simpler sentences: In Europe, he was principal conductor of the Camerata Salzburg from 1997 to 2006. He served as principal conductor of the Stuttgart Radio Symphony Orchestra from 1998 to 2011.