http://www.slideshare.net/CraigTrim/bluemix-nl-classifier-tutorial
https://developer.ibm.com/watson/blog/2015/11/11/watson-question-and-answer-service-to-be-withdrawn/
The four replacement services recommended for different types of question and answer capabilities are:
Natural Language Classifier – allows you to Interpret and classify natural language with confidence.
Dialog – allows you to script a conversation and help walk a user through a process
Retrieve and Rank – allows information retrieval with a machine learning model
Document Conversion – takes documents and ‘chunks them up” into smaller answer units to return as passages
