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what was the highly rated rated r documentary movie that starred whitney houston in the last six years
 highly rated, r, documentary, whitney houston, last six 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:
 highly rated, r, documentary, whitney houston, last six years