<http://webisa.webdatacommons.org/prov/300697982>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/38853632> .
<http://webisa.webdatacommons.org/38853632>	<http://www.w3.org/ns/prov#value>	"The connection between vaccines and lower risk of certain kinds of cancers was hypothesized in the early 1990s, and strengthened in 2003." .
<http://webisa.webdatacommons.org/38853632>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/38853632>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<scienceblogs.com> .