About: http://webisa.webdatacommons.org/218880711

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	This video covers all kinds of word problems-age problems, digit problems, averages, work problems,mixture and leverage.
http://www.w3.org/ns/prov#wasQuotedFrom	amazon.com