About: http://webisa.webdatacommons.org/168960197

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	With that, centering a text is a matter of computing the position dependent on the render size (another possibility would be to work with a combination of position and sprite origin of course):
http://www.w3.org/ns/prov#wasQuotedFrom	silverlightshow.net