TASK DEFINITION: In this task, you are given sentences from movie reviews. The task is to classify a sentence as "POS" if the sentiment of the sentence is positive or as "NEG" if the sentiment of the sentence is negative
PROBLEM: The screenplay never lets us forget that Bourne was once an amoral assassin just like the ones who are pursuing him ... There is never really a true `` us '' versus `` them '' .

SOLUTION: POS

PROBLEM: A film that clearly means to preach exclusively to the converted .

SOLUTION: NEG

PROBLEM: An exercise in cynicism every bit as ugly as the shabby digital photography and muddy sound .

SOLUTION:
NEG