About: http://webisa.webdatacommons.org/88069127

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	in other words, considering that an index is a b-tree, can MySQL skip the column in the middle and still do a quick search on first and last columns?
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com