Task: Sentiment Analysis
Input (English): Review: I had to purchase this book for a community college class I'm taking. As a "textbook," it has been a complete disappointment. The "science" is sketchy, the research is shoddy, and the huge holes in logic are brushed over with explanations like "you can't prove nearly anything empirically in education" (straight from page 8!). Some of the concepts presented are interesting, but since Mr. Jensen (no, he doesn't hold a doctorate) provides almost no citations for his claims, there is no way to check his assertions or determine where the theories come from. The book reads like a multilevel marketing sales pitch. In fact, you are encouraged to share it with your friends and colleagues and are directed to a website where you could empty your bank account getting "certified" in Mr. Jensen's unique, "empirically unproven" techniques. 
 Polarity: Negative
Output (English): True