user_query: Avery's birthday
response_text: OK. Avery's birthday. Anything else?
user_query: add jewellery (gift) to the list
response_text: Sure. Jewellery (gift) on your list called "Avery's Birthday". Anything else?
user_query: make a new list called Avery's birthday
response_text: OK, I made a list called "Avery's Birthday".
User: Include popcorn on my movie list.
Parse: Add_item_to_list ( items « popcorn » list_label « movie » list_owner « my » list_singular_or_plural « list » )