Instruct: Classify a review into positive or negative sentiment.
Query: Sagan was no scientist!

A well written book by a non-scientist. He should stick to making kids laugh... For example, at one point he causes a character to remark that information can be found in the digits of pi. And the writer seemed to have no idea that ALL information can be found SOMEWHERE in those digits. Why? Because the digits of pi are infinite and random. So, somewhere is your phone number, and somewhere else is the product of your zip code multiplied by the square root of your zip code added to your age. Get it? ALL information can be found to exist in an infinitly long and random string. The only issue is how much computing time will be required to find such. Anyway, his character was supposed to have a good knowledge of math and did not understand this simple fact. In fact, she was quite driven by her ignorance of such things.