About: http://webisa.webdatacommons.org/188939143

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	For example, here is a post explaining that the optimal (non-curved) grade is roughly 50-80%.
http://www.w3.org/ns/prov#wasQuotedFrom	metafilter.com