some of the computer animation is handsome , and various amusing sidekicks add much-needed levity to the otherwise bleak tale , but overall the film never rises above mediocrity . 
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(ROOT (S (S (NP (NP (DT )) (PP (IN ) (NP (DT ) (NN ) (NN )))) (VP (VBZ ) (ADJP (JJ )))) (, ) (CC ) (S (NP (JJ ) (JJ ) (NNS )) (VP (VBP ) (NP (ADJP (RB ) (HYPH ) (VBN )) (NN )) (PP (IN ) (NP (DT ) (ADJP (RB ) (JJ )) (NN ))))) (, ) (CC ) (S (ADVP (RB )) (NP (DT ) (NN )) (ADVP (RB )) (VP (VBZ ) (PP (IN ) (NP (NN ))))) (. )))