About: http://webisa.webdatacommons.org/321692011

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	Response rates can be low13 so multiple methods of recruitment to supplement enrollment are recommended and incentives such as gift certificates or electronic money can be offered.4,5 The vouchers can be transmitted via email.
http://www.w3.org/ns/prov#wasQuotedFrom	resourcenter.net