What is the ID of actors that acted in the movies most viewed by audience with occupation 5?
The audience and users are the same meaning
SELECT T3.actorid FROM users AS T1 INNER JOIN u2base AS T2 ON T1.userid = T2.userid INNER JOIN movies2actors AS T3 ON T2.movieid = T3.movieid WHERE T1.occupation = 5 GROUP BY T2.movieid ORDER BY COUNT(T1.userid) DESC LIMIT 1
database name:db_id movielens
users table users Cols: user id dtype integer, age dtype text, user gender dtype text, occupation dtype text, 
directors table directors Cols: director id dtype integer, director quality dtype integer, average revenue dtype integer, 
actors table actors Cols: actor id dtype integer, actor gender dtype text, actor quality dtype integer, 
movies table movies Cols: movie id dtype integer, year dtype integer, is English dtype text, country dtype text, runningtime dtype integer, 
movies2actors table movies2actors Cols: movie id dtype integer, actor id dtype integer, cast number dtype integer, 
movies2directors table movies2directors Cols: movie id dtype integer, director id dtype integer, genre dtype text, 
u2base table u2base Cols: user id dtype integer, movie id dtype integer, rating dtype text, 
