Instruct: Classify Amazon reviews into positive or negative sentiment
Query: History and geology

This video consists of geology and history of what is known about the Grand Canyon. If you are looking for a "vacation" video of what to see and do during a visit, you should probably choose a different title. Very well put together with excellent video and narration. It didn't go in to depth on many topics, but raised a lot of questions about the current state of many issues at the Grand Canyon.