user_query: create a list for favorite songs
response_text: Alright, I made a list called "Favorite Songs".
user_query: add happy birthday
response_text: OK. Happy birthday on your list called "Favorite Songs". Anything else?
user_query: clear favorite songs
response_text: What do you want to add?
User: I want to add 4 cosas nuevas to to-do list.
Parse: Add_item_to_list ( list_label « to-do » list_singular_or_plural « list » number « 4 » )