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what are some titles of really popular movies about sport that were rated r from the last four years
 really popular, sport, r, last four years
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: genre, year, plot, average ratings, actor, title, song, character, rating, review, director, trailer 
Text: {0} 
Answer:
 really popular, sport, r, last four years