About: http://webisa.webdatacommons.org/151100557

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	It is hard to assign income levels to the three groups, especially because of widely varying differences between city and country, differences between states and areas, and also a constant rate of inflation.
http://www.w3.org/ns/prov#wasQuotedFrom	umn.edu