Review: naipaul fans may be disappointed . 
Sentiment: negative

Review: extends to his supple understanding of the role that brown played in american culture as an athlete , a movie star , and an image of black indomitability 
Sentiment: positive

Review: a moving , if uneven , success 
Sentiment: positive

Review: those moviegoers who would automatically bypass a hip-hop documentary should give `` scratch '' a second look . 
Sentiment: positive


Review: for one of the worst movies of one year