About: http://webisa.webdatacommons.org/61395754

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	They controlled for differences such as area and climate, human population size, and per capita consumption.
http://www.w3.org/ns/prov#wasQuotedFrom	phys.org