Review: authentically vague , but ultimately purposeless , study 
Sentiment: negative

Review: better film 
Sentiment: positive

Review: the star who helped give a spark to `` chasing amy '' and `` changing lanes '' falls flat as thinking man cia agent jack ryan in this summer 's new action film , `` the sum of all fears . '' 
Sentiment: negative

Review: even the hastily and amateurishly drawn animation can not engage . 
Sentiment: negative


Review: it 's leaden and predictable , and