About: http://webisa.webdatacommons.org/67698930

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	There is a chapter on working with groups of rows that takes you through Set functions such as Count, Sum and Avg, how to change data types and create groups.
http://www.w3.org/ns/prov#wasQuotedFrom	i-programmer.info