Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A great movie on an important issue

Michael Douglas has produced a great movie about the intricate world of drugs and the violence that it causes in all walks of life. [...] Drug law enforcement creates tremendous moral and ethical problems. Douglas has portrayed it brillinatly. Catherine Zeta Jones is as lovely as ever and acted very well. Douglas is a superb actor. It is a captivating movie.