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

Ex Input:
This would have been a very short book if all of the racism and sexuality were to be removed. I read it for an Appalachian Literature class, and I felt this book was so racey that I couldn't enjoy reading it. The vulgarity in it is also not necessary, and I feel that it should not be called literature because of this.

Ex Output:
Negative

Ex Input:
Very intuitive in explaining the basic concepts and the fundamental and widely used methods in continuous-time finance. No deep background in math is required to have a good grasp of this book. I believe it is intuition rather than fancy skills that is important to build up interest and passion for studying a hard topic such as continuous-time finance.

Ex Output:
Positive

Ex Input:
Just as the title says, book of nonsense. A book of poorly written rhymes, lacking even a hint of smutty humour.

Ex Output:
Negative