About: http://webisa.webdatacommons.org/456485138

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	In fact, in case there was a technological problem with the test, or we had to start over for any reason, I made multiple test envelopes, each with all the materials required for a single test.
http://www.w3.org/ns/prov#wasQuotedFrom	randi.org