Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Mario Lanza

I love opera, so I have enjoyed all of Mario Lanza's films and Kathryn Grayson's films. I think if he had lived, he would have been a great opera singer. This video shows what he can really sing, and it was very entertaining. I also think that Kathryn Grayson sang beautifully for time that these videos were made.