user_query: Add item to Christmas
response_text: What do you want to add?
user_query: Add item to To Do instead
response_text: What do you want to add?
User: Leer first 3 messages from Pedro.
Parse: Get_message_content ( message Electronic_message ( medium « messages » quantity NonNegativeSimpleNumber ( Number « 3 » ) sender Personal_contact ( person « Pedro » ) ) modality « Leer » )