Classify given movie review into two categories: positive, or negative based on its content.

Example Input: there is a certain sense of experimentation and improvisation to this film that may not always work , but it is nevertheless compelling .
Example Output: positive

Example Input: the film is surprisingly well-directed by brett ratner , who keeps things moving well -- at least until the problematic third act .
Example Output: negative

Example Input: this isn't exactly profound cinema , but it's good-natured and sometimes quite funny .
Example Output:
positive