...
A student was read the following in stages: "You are planning a trip to Newton, Massachusetts from May 17, 2012 to June 12, 2012. Please enter this information. How many people will be within 200 km of you during the date range you just specified? What are their names? How many people are within 360 kilometers? Who is/are the new person/people given this new specification? If you changed your trip's end date to June 13, 2012, how many more people will be near you? Change your trip's start date to July 13, 2012 and end date to August 11, 2012. How many people are within 360 km of you? Finally, change your location to Indianapolis, Indiana, but keep the dates July 13 and August 12. Who is the only person within 200 km of you? Add your new trip."
...