user_query: Create Students List.
response_text: Sorry, it looks like you already have a list with that name. Do you still want to make a new one?
user_query: Create Subjects list.
response_text: OK, I made a list called "Subjects".
user_query: Create Teachers list.
response_text: OK, I made a list called "Teachers".
user_query: Delete Students and Teachers list.
response_text: OK, what do you want to call it?
user_query: Delete Students list and Teachers list.
response_text: OK, I made a list called "Delete Students List And Teachers List" and added those two things.
User: Track exercise.
Parse: Start_exercise ( )