Review: one of the worst films of the summer 
Sentiment: negative

Review: made nature film and a tribute 
Sentiment: positive

Review: but dull and ankle-deep ` epic 
Sentiment: negative

Review: that chirpy songbird britney spears has popped up with more mindless drivel . 
Sentiment: negative


Review: while its careful pace and seemingly opaque story may not satisfy every moviegoer 's appetite , the film 's final scene is soaringly , transparently moving .