The conversation between human and AI assistant.
[|Human|] Randy Couture was one of how many fighters over the age of 40 to have won a UFC championship?
[|AI|] Randy Couture was one of two fighters over the age of 40 that won a UFC championship fight.
[|Human|] 
Randy Couture was one of how many fighters over the age of 40 to have won a UFC championship?