Complex sentence: As of Spring 2005, the Frog Brigade has not recorded any new material since Purple Onion, and the band has not gone on a major tour since Summer 2003, but has occasionally re-formed to play other one-off shows and music festivals.
Split into simpler sentences: As of Spring 2005, the Frog Brigade has not recorded any new material since Purple Onion. The band has not had a major tour since Summer 2003, but has occasionally re-formed to play other one-off shows and music festivals.