user_query: I want to remove onions off my shopping list 
response_text: Sure, I deleted onions.
user_query: I want to add onions to my shopping list 
response_text: Got it, I added onions.
user_query: I want to get my shopping list 
response_text: You have two things on that list.
User: Send an email with my new song to Janet, no, to Marcus.
Parse: Send_digital_object ( medium « email » object « my new song » recipient Personal_contact ( person « Marcus » ) )