text: WITH actor_films AS 
  (
  	SELECT 
    		fa.actor_id,
    		first_name,
    		last_name,
    		COUNT(film_id) AS film_count
    	FROM film_actor fa
    	INNER JOIN actor act
    	ON fa.actor_id = act.actor_id
    	GROUP BY fa.actor_id, first_name, last_name
  )
  
  SELECT 
  	actor_id,
  	first_name,
  	last_name
  FROM actor_films
  ORDER BY film_count DESC
  LIMIT 1