About: http://webisa.webdatacommons.org/67229489

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	The most common operations and functions such as plus and sin have been predefined explicitly as empty elements (see Section 4.4 The Content Markup Elements).
http://www.w3.org/ns/prov#wasQuotedFrom	w3.org