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

This enthralling documentary ... is at once playful and haunting , an in-depth portrait of an iconoclastic artist who was fundamentally unknowable even to his closest friends .
POS

What might have been readily dismissed as the tiresome rant of an aging filmmaker still thumbing his nose at convention takes a surprising , subtle turn at the midway point .
NEG

The actors improvise and scream their way around this movie directionless , lacking any of the rollicking dark humor so necessary to make this kind of idea work on screen .

NEG