What are some great progressive rock bands?
RUSH, Yes, Genesis, the Alan Parsons Project, Pink Floyd, King Crimson, Emerson Lake and Palmer, Jethro Tull
Instruction: What are some great progressive rock bands?
Context: 
Response: RUSH, Yes, Genesis, the Alan Parsons Project, Pink Floyd, King Crimson, Emerson Lake and Palmer, Jethro Tull