Mr. King then used the Crimson software to examine how many posts in each category had later been censored.

WSJ: Watching How China Censors

"Peter was in Yes when they were formulating what would become their classic sound and they were as much a figurehead of progressive rock in its classic era as the likes of Genesis, Pink Floyd, King Crimson and Jethro Tull, " he said.

BBC: Peter Banks: Original Yes guitarist dies aged 65

Crimson Hexagon has already been using the software for which Mr. King received a patent in May to help companies understand the nuances of brand recognition via subscription and consulting services.

WSJ: Watching How China Censors