Instructions: Given an English language product review, determine if it is a Good Review or a Bad Review. A good review is one where the product's review has positive tone and Bad review is one where the tone of product's review is negative.
Input: This book started out interesting, but then took too many turns into unbelievability right from the beginning. Just couldn't believe how stupid this guy was. Even in fiction, we can't be that dumb.
Output:
Bad review