Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Bob Rizzo is a great instructor!

Rizzo presents a complete jazz class, starting with warm-ups that are appropriate for beginners to intermediate dancers, and continuing to across the floor progressions that include variations that can challenge your upper level dancers. The video ends with two routines, one at intermediate level, the other for advance students that are wonderful! Bob Rizzo's instructions are clear and his voice is pleasant to listen to.