About: http://webisa.webdatacommons.org/97376832

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	I know I could easily implement this using TikZ, but stacking two \lnots seems easier to make work at multiple font sizes. (I will not probably be using this at any size other than 10pt, but I might use it in a footnote or a caption.)
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com