Review: 's far from a frothy piece 
Sentiment: positive

Review: is one of this year 's very best pictures 
Sentiment: positive

Review: gratingly unfunny groaner 
Sentiment: negative

Review: ... `` bowling for columbine '' remains a disquieting and thought-provoking film ... 
Sentiment: positive


Review: loses its fire midway , nearly flickering out by its perfunctory conclusion .