chicago_comm            Chicago Community Areas (2010).
clev_pts                Cleveland Home Sales (2015).
commpop                 Chicago Population Change (2000-2010).
guerry                  Guerry "Moral Statistics" (1830s).
ncovr                   Homicides & Socio-Economics (1960-90).
nyc                     Rental Housing and Demographics in NYC (2000s),
                        non-spatial.
nyc_sf                  Rental Housing and Demographics in NYC (2000s).
ohio_lung               Ohio Lung Cancer Mortality (1960s-80s).
vehicle_pts             Abandoned Vehicles (2016).
