In this task, you are given books product reviews in English language. The goal is to classify the review as "POS" if the overall sentiment of the review is positive or as "NEG" if the overall sentiment of the review is negative.

Let me give you an example: Hopeful for those who seek harmony in the world . I wouldn't recommend this to anyone who thinks that religious wars, repression of individual spirits or rape of the earth are good things. Those who seek peace, harmony, celebration of each of us and respect for our earth will find this hopeful
The answer to this example can be: POS
Here is why: The overall sentiment of the review is positive as the reviewer mentions positive expressions such as 'hopeful', 'will find this helpful' etc.. Hence, the label is 'POS'.

OK. solve this:
Not worth the $ and frustration . I returned to college to further my education this year after working as a High School Chemistry and Biology teacher for the last 5 years, and your text "Fundamentals of Analytical Chemistry (with CD-ROM and InfoTrac) 8th Edition" is the required text that we are using for my Quantitative Analysis course. Myself and numerous other students in the class have found ourselves completely exasperated with the text for numerous reasons. Some of the reasons are as follows: 1. Formulas written incorrectly, while the definition/derivation is written properly right next to it, or vice versa. 2. Incorrect answers to the end of the chapter questions given in the back of the book. 3. The end of the chapter questions will often have no previous examples shown in the chapter, or in the chapters prior to it. Essentially there is no guide or basis to begin a question. 4. Asking for something in a way that is so convoluted that one has no idea what is being asked. 5. Suddenly using or asking for a term that has never been used in the book. Such as asking for "molar solubility"...nothing in text as to referred, nothing in the index, and nothing in the glossary. 6. Your solved examples within the chapter are atrocious, in that they are of virtually no use when trying to use them as a guide to the end of the chapter questions. And thank you for skipping/not showing steps or assuming things in the problems when they are shown. These are great given that one comes to consider the questions, Did I make an algebraic error in solving? Was the formula given the correct one, and was it even given correctly? Did I do it correctly, and is it just the wrong answer given in the back of the text? I have taken into consideration that I have been out of school for a while and that I may not be as sharp as I used to as far as some of the more complicated calculations, because I have not had much practice recently, however, when one is trying to learn from a book that makes it so hard to do anything with it, it makes it about as useful as a paperweight, which is about the best use I have for it now. A $100+ paperweight. I thought that the mistakes were due to an early edition text, but with a simple view of the front of this book one can readily see that this is the 8th edition...the EIGHTH edition! One would think that after writing the same book 8 times, these errors and some general refinements may have taken place; thank you for the exception to the rule. In all my years of school, I have come across many books, both used to learn from as well as ones to teach from, and I have never found a more poorly done text. We, the students and professor, have created a website solely dedicated to the errors or oddities that we have so far found in the text: Needless to say, it continues to grow. I will say that it is nice to see you incorporating Excel and other software into the text, which is beneficial in its use in Industry and presentation. Thought you might want to know...thanks.
Answer:
NEG