Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Written by linguists who failed semantics

I have often thought that such a language tool should be written; now I think it needs an editor. The book was a fine effort, but, nebulous linguistic boundaries aside, the book presented as fact statements that simply are not true. For example, the Irish "O", seen on so many surnames, does not mean "son of," as the book states, but rather "grandson of." Unfortunately, this is only one example of faulty research. The book is well researched in its presentation of grammar forms and linguistic boundaries (making for a good atlas), but the faulty research and questionable timelines ruin the finished product. Caveat: this book should only be used by linguists who will recognize errors when they come across them; a non-linguist might become seriously impaired in further linguistic research by this book.