About: http://webisa.webdatacommons.org/147699174

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 query, without the LAG function requires creating some sort of temporary table and joining to it once over each of last_month, three_months_ago, six_months_ago, nine_months_ago and twelve_months_ago.
http://www.w3.org/ns/prov#wasQuotedFrom	brentozar.com