user_query: Wednesday
response_text: OK, buy dog food for Sunday every 3 weeks. At what time?
user_query: make it every three weeks
response_text: OK, buy dog food for Sunday every 3 weeks. At what time?
user_query: Create a task called buy dog food.
response_text: OK, do you want to add time?
User: Add oranges and bread on the list called pique-nique.
Parse: Add_item_to_list ( items « oranges » items « bread » list_singular_or_plural « list » list_title « pique-nique » )