About: http://webisa.webdatacommons.org/231259586

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	Reply ??? Adding Block Support to Existing Classes (Without Subclassing) (4 years) [???] completion handlers in such APIs such as Core Animation, in fact I have already done a post on this previously.
http://www.w3.org/ns/prov#wasQuotedFrom	objcolumnist.com