Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Excellent

This is without doubt the best English dictionary on the market. In fact, this book is the only reference you may need to enhance and improve your vocabulary. I would like to stress though that the book is intended primarily for advanced students of english language. I own a great number of dictionaries but none of them is nearly as good as this one. The greatest strength of this dictionary is the improved structure that facilitates retrieval of the target word. Moreover, the dictionary provides valuable examples as to how to use the words in various contexts. This feature will help you choose the correct word in any given context. I strongly recommend this book to all learners of english language, but especially to the advanced students!