Instruct: Classify Amazon reviews into positive or negative sentiment
Query: 1/4 mile wide - 1 inch deep

If you know anything at all about XML and the semantic web - DO NOT WASTE YOUR MONEY ON THIS BOOK. This book covers nothing in depth. I just spent 3 nights reading this book - waiting for something to happen - it never does. The author does not go into any decent technical detail on anything. If you have ever worked with XML and want to learn something about RDF etc... this is not the book for you.