Question: Where does the data come from?
Answer: crowsourcing platform
Alternative answer: For ins scope data collection:crowd workers which provide questions and commands related to topic domains and additional data the rephrase and scenario crowdsourcing tasks proposed by BIBREF2 is used. 
For out of scope data collection:  from workers mistakes-queries written for one of the 150 intents that did not actually match any of the intents and using scoping and scenario tasks with prompts based on topic areas found on Quora, Wikipedia, and elsewhere.