The conversation between human and AI assistant.
[|Human|] Based on this passage, why is Chris Kuroda's nickname CK5?
[|AI|] Chris Kuroda's nickname, CK5, adds the number 5 to his initial. That is because his improvised light shows during Phish concerts give him a role comparable to a fifth member of the band.
[|Human|] 
Based on this passage, why is Chris Kuroda's nickname CK5?