A Haskell function that receive a List with different types and returns only a Integer List : I have a function like this : 

> '[(String, [Int], Int)]'

I desire a function that returns a list that just returns a list of '[Int]' 

Input example : 

> [("R1",[6,10,14],6),("R2",[8,10,14],8),("R3",[11,15,24],11)]

Output example (the bahavior that I want of the output) : 

> [6,8,10,11,14,15,24]

I've been thinking in create a function of input, like this : 

> function :: [(String, [Int], Int)]
> function = [("R1",[6,10,14],6),("R2",[8,10,14],8),("R3",[11,15,24],11)]

And another to convert it to what I desire, like this :

> convert :: [(String, [Int], Int)] -> [Int]
> convert [] = []
> ...

 How can I develop the function "convert"?