About: http://webisa.webdatacommons.org/421706847

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	An operator is a function that is written as a word: e.g. trigonometric functions (sin, cos, tan), logarithms and exponentials (log, exp).
http://www.w3.org/ns/prov#wasQuotedFrom	wikibooks.org