Instruct: Classify Amazon reviews into positive or negative sentiment
Query: If you have a breast problem you need this book!

The first breast problem I had turned out to be a cyst, and this book gave me all the information I needed to prepare myself and understand the procedures. Four years later I was diagnosed with breast cancer. I don't know how I could have gotten through everything without it. If you have a problem, do yourself a favor and buy this book. It is worth ten times the price.