<http://webisa.webdatacommons.org/prov/498047980>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/139179413> .
<http://webisa.webdatacommons.org/139179413>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<solarcooking.org> .
<http://webisa.webdatacommons.org/139179413>	<http://www.w3.org/ns/prov#value>	"must admit, that its theory is the weakest part of my knowledge" .
<http://webisa.webdatacommons.org/139179413>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .