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

Example Input: a reasonably efficient mechanism , but it offers few surprises and finds its stars slumming in territory they should have avoided .
Example Output: negative

Example Input: the film fearlessly gets under the skin of the people involved . . . this makes it not only a detailed historical document , but an engaging and moving portrait of a subculture .
Example Output: positive

Example Input: pleasant but not more than recycled jock piffle .
Example Output:
negative