Simplify the following text for a Grade 5 native English-speaking person.
Original: In addition , it is ranked third , behind Citizen Kane and Casablanca , on the AFI 's 100 Yearsâ 100 Movies list by the American Film Institute .
Simplified: In addition , many have called it the best movie of all time ; it also appears on many such lists , including AFI 's 100 Years ... 100 Movies ( where it was ranked at number three ) .