user_query: add cheese to my shopping list 
response_text: OK, I added cheese.
user_query: add to my shopping list 
response_text: You have two things on that list.
user_query: get my most recent list 
response_text: You have eleven lists. Which one do you want to know about?
user_query: Pull up my lists 
response_text: You have quite a few lists.
User: Take a picture of Peter I mean Ellen.
Parse: Take_photo ( subject « Ellen » )