user_query: To do
response_text: What do you want to add?
user_query: Add to list
response_text: OK. Which list do you want to add to?
User: Get Scott's Lieblingsfilme list on Keep.
Parse: Get_list ( list_app « Keep » list_label « Lieblingsfilme » list_owner « Scott » list_singular_or_plural « list » )