user_query: create a vocation list
response_text: Got it, I made a list called "Vocation".
user_query: add beach
response_text: Sure. Beach on your list called "Vocation". Anything else?
user_query: add library
response_text: Got it. Library. Anything else?
User: Please start my uhh walk now.
Parse: Start_exercise ( activity « walk » )