About: http://webisa.webdatacommons.org/208359873

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	These books have all sort of good problems (with solutions) collected from reputed US universities.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com