Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Very Disappointed

I was hoping to get more examples to supplement the Rosen book, but I was very disappointed when one of the first topics that I looked up had information contrary to the text book. Upon further research, I discovered that the Rosen book was right and this one was wrong. I tried other topics too, but the examples didn't seem any better than the text book or what you can find online for free.