Complex sentence: In 2006, Stagedoor produced the premiere performance of Disney's High School Musical; in 2007, Stagedoor produced special workshop productions of Avenue Q and Rent in partnership with MTI (Music Theatre International).
Split into simpler sentences: In 2006, Stagedoor produced the world-premiere of Disney's High School Musical. In 2007, Stagedoor produced special workshop productions of Avenue Q and Rent in partnership with MTI (Music Theatre International).