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: But ticket-buyers with great expectations will wind up as glum as Mr. De Niro .

SOLUTION: NEG

PROBLEM: By turns gripping , amusing , tender and heart-wrenching , Laissez-passer has all the earmarks of French cinema at its best .

SOLUTION: POS

PROBLEM: At its worst , the movie is pretty diverting ; the pity is that it rarely achieves its best .

SOLUTION:
NEG