Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.

Let me give you an example: I've read this book with much expectation, it was very boring all through out the book
The answer to this example can be: Negative
Here is why: Review writer does not like the book because it was boring, therefore it is a negative review.

OK. solve this:
I remember Armored Saint from their tour opening for WASP and Metallica. L'Amour in Brooklyn. These guys ROCKED. Unfortunately this album, lacking second guitarist Phil Sandoval, does not rock. Poor production values, even explained on the liner, makes it even less acceptable. I gave it the second star only because it was great to hear "Can U Deliver?" again and I can't find the now out of print "March of the Saint" first album. Buy it if you're a die-hard Saint fan like myself, but if you're looking for a good Saint album currently available get "Symbol Of Salvation" instead. It's pretty rockin'.
Answer:
Negative