Task: Assign the sentence to a corresponding ordinal class that best reflects the inferred mental state of the writer, based on the intensity of positive or negative sentiment expressed. 2: very positive, 1: positive, 0: neutral, -1: negative, -2: very negative.
Sentence: unlike most teen flicks , swimming takes its time to tell its story , casts mostly little-known performers in key roles , and introduces some intriguing ambiguity .
Intensity class: 