user_query: create a countries list
response_text: OK, I made a list called "Countries".
user_query: add Peru to the list
response_text: OK. Peru on your list called "Countries". Anything else?
user_query: no
response_text: OK, your list is updated.
User: Let's play Mario against Jean Lecomte.
Parse: Play_game ( GameName « Mario » Opponent « Jean Lecomte » )