About: http://webisa.webdatacommons.org/50702940

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	A hundred years ago Chicago had a miniature underground train system that criss-crossed beneath the streets, delivering coal and other materials?
http://www.w3.org/ns/prov#wasQuotedFrom	alldiscountbooks.net