Complex sentence: In 1998, at the age of twenty-one, Cahoone moved to Seattle, Washington was the drummer bands including Carissa's Wierd, Los Angeles singer-songwriter Patrick Park, and Band of Horses.
Split into simpler sentences: In 1998, at the age of twenty-one, Cahoone moved to Seattle, Washington. After that, Cahoone played drums with various bands including Los Angeles singer-songwriter Patrick Park and most notably, Band of Horses.