user_query: Add an item to Fitness list.
response_text: What do you want to add?
user_query: Tae Bo
response_text: Sure, I added Tae Bo.
User: Tell me the message from Jan from Jan from yesterday.
Parse: Get_message_content ( message Electronic_message ( date « yesterday » medium « message » sender Personal_contact ( person « Jan » ) ) modality « Tell » )