actors' :: [MediaType] -> Maybe [Actor]
actors' (x:xs) = case x of
    (Actors a) -> Just a
    _ -> actors' xs
actors' :: [MediaType] -> Maybe [Actor]
actors' (x:xs) = case x of
    (Actors a) -> Just a
    _ -> actors' xs
actors' (x:xs) = case x of
    (Actors a) -> Just a
    _ -> actors' xs