About: http://webisa.webdatacommons.org/436852007

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	When using SET operators the number of columns and the data types of the columns must be identical in all of the SELECT statements used in the query.
http://www.w3.org/ns/prov#wasQuotedFrom	wordpress.com