user_query: Add toothpaste and hand sanitizer on it
response_text: Alright. Those two things on your list called "Things To Buy". Anything else?
user_query: frozen berries and corn
response_text: Got it. Frozen berries and corn. Anything else?
user_query: add peanut butter and bread
response_text: OK. Frozen berries and corn. Anything else?
User: Put a small chocolate milkshake in Weight Watchers.
Parse: Log_nutrition ( food « chocolate milkshake » provider « Weight Watchers » size « small » )