About: http://webisa.webdatacommons.org/12222424

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	Another prominent theme in U.S. history that has parallels elsewhere is the frontier, which plays a comparable role in the histories of Russia and other states that expanded at the expense of neighboring peoples.
http://www.w3.org/ns/prov#wasQuotedFrom	historians.org