We are using three sample data sets from SF OpenData, San Francisco's open data portal:
Film Locations in San Francisco https://data.sfgov.org/Culture-and-Recreation/Film-Locations-in-San-Francisco/yitu-d5am Accessed December 10, 2015.
SF Civic Art Collection https://data.sfgov.org/Culture-and-Recreation/SF-Civic-Art-Collection/zfw6-95su Accessed December 10, 2015.
and the San Francisco Food Truck data,
Mobile Food Facility Permit https://data.sfgov.org/Economy-and-Community/Mobile-Food-Facility-Permit/rqzj-sfat Accessed December 10, 2015.
Note from DataSF:
"The City makes no representation or warranty that the information contained in the Data is accurate, true or correct. In using the Data, you understand and agree that the information contained therein is subject to error, and cannot be relied upon without verification or site inspection."