Conversation so far:
Who was Graham Chapman?
Graham Chapman was an English comedian, actor, and writer, known for his writing partnership with John Cleese and his role in British surreal comedy group, Monty Python.
What activities did Graham Chapman and John Cleese do when they wrote together?
During writing sessions, Cleese and Chapman would come up with inspiration by using Roget’s Thesaurus. Reading words out at random, like 'plummet', inspired their first Monty Python skit 'Flying Sheep'.

Question: What type of material did they write?
Self-contained rewrite: What type of material did John Cleese and Graham Chapman write together?