user_query: Begin a new list with bacon, potatoes, french toast, mangoes, and tea
response_text: OK, what do you want to call it?
user_query: Breakfast
response_text: Got it, I made a list called "Breakfast" and added those four things.
user_query: Delete the list that has the items bacon and tea on it.
response_text: Got it, I deleted those two things.
User: Exit my stretching, no, yoga session.
Parse: Stop_exercise ( activity « yoga » )