user_query: create a grocery list and add celery, tomato, buns, ketchup, mayo to the list
response_text: Sorry, it looks like you already have a list with that name. Do you still want to make a new one?
user_query: yes
response_text: OK, I made a list called "Grocery" and added those three things.
User: Please show me the message from Jane.
Parse: Get_message_content ( message Electronic_message ( medium « message » sender Personal_contact ( person « Jane » ) ) modality « show » )