About: http://webisa.webdatacommons.org/358129207

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	exchange of services (from a teacher, for instance) for various kinds of rewards
http://www.w3.org/ns/prov#wasQuotedFrom	ericdigests.org