Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Pretty good video instruction for classical ballet

This videotape gives a fairly good introduction to the basic exercises in classical ballet. Beginners will have to rewind it frequently to understand the exercises; advanced students may find it helpful for teaching purposes. The narrators are pretty good at explaining things, and someone who just wants to get a workout but with a ballet flavor should buy it. The exercises in the tape are not aerobic, but the precision required in performing them will definitely be a good workout, for the body and the mind.