Complex sentence: Since the mid- 1990s, he added to his schedule concerts and recordings with the reunited Box Tops and a version of Big Star that included two members of The Posies, Jon Auer and Ken Stringfellow.
Split into simpler sentences: Since the mid- 1990s, he added to his schedule concerts and recordings with the reunited Box Tops and a version of Big Star. Chilton also reformed Big Star, with a line-up that included two members of The Posies, Jon Auer and Ken Stringfellow.