OpenNLP tutorial or book I am very new to Java and primarily a Python and R user. I want to use OpenNLP for certain NLP tasks that I have been entrusted with. Is there any good tutorial or book on OpenNLP that anyone can recommend?
I've tried this one, and is very straight forward and easy to follow.

Java is very similar to python in some sense so it shouldn't be a problem for you if you have done OO.

If you want to get deeper inside natural language understanding and processing I recommend this book.