About: http://webisa.webdatacommons.org/101992528

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	(Go through some examples of functions and non-functions in several formats [mapping diagrams, sets of points, graphs] and have students tell you whether they are functions or not.)
http://www.w3.org/ns/prov#wasQuotedFrom	teachengineering.org