Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Worthless!

I am sorry to say that this has been a complete waste of money. I bought the book as part of the required reading list for a biostatistics class and have found it to be entirely inadequate. I would advise others to save their money and rather reference the multiple online manuals available. At least those cover all the functions, provide better examples, and are free! This one is going straight for the recycling bin...