Task: Sentiment Analysis
Input (English): I've tried in vain to find a good book on the subject of learning and teaching Japanese. This one is not it. It has no index, so your first stop for any words or notes might have different meanings if you wanted them -- that is, they can refer back to prior chapters, but it's impossible for this reader to find them. No matter where I go through the book, it requires multiple readings to finish all the entries.
Output (English): Bad review