Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Manual labor is hard

Chuck will keep you smiling as your read his books. They contain plenty of humorous stories while they display the stone arts. There are better guides but you should read as many as possible: you'll need it.Stone work is the hardest task you'll probably ever do in your life. If your project is big, it seems to never end and you'll doubt you'll ever finish. One rock can take 2 hours to lay whereas if all goes well, you can lay 5 in an hour. So, if you are interested in stone work, I'd advise to start small on the first few projects. This book is a good guide to helping you along the way.