Complex sentence: The Who occasionally re-formed for live appearances such as Live Aid in 1985, a 25th anniversary tour in 1989 and a tour of "Quadrophenia" in 1996, before resuming regular touring in 1999, with drummer Zak Starkey.
Split into simpler sentences: The Who occasionally re-formed for live appearances such as Live Aid in 1985, a 25th anniversary tour in 1989 and a tour of "Quadrophenia" in 1996. They resumed regular touring in 1999, with drummer Zak Starkey.