user_query: add tomatoes to my first shopping list
response_text: OK, I added tomatoes.
user_query: replace tomatoes with oreo cookies on my first shopping list
response_text: I couldn't find a list called "First Shopping."
user_query: change tomatoes on my first shopping list
response_text: What do you want to call it instead?
User: I'd like to send a message, I mean a text to Julie with a screenshot attached.
Parse: Send_digital_object ( attachment « screenshot » medium « text » recipient Personal_contact ( person « Julie » ) )