How many PG adventure movies did Ron Clements direct?
Ron Clements refers to director = 'Ron Clements'; PG is an abbreviation for parental guidance and refers to MPAA_rating = 'PG'; adventure movie refers to genre = 'Adventure';
SELECT COUNT(*) FROM director AS T1 INNER JOIN movies_total_gross AS T2 ON T1.name = T2.movie_title WHERE T1.director = 'Ron Clements' AND T2.MPAA_rating = 'PG' AND T2.genre = 'Adventure'