<http://webisa.webdatacommons.org/prov/37808172>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/429273819> .
<http://webisa.webdatacommons.org/429273819>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<utoledo.edu> .
<http://webisa.webdatacommons.org/429273819>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/429273819>	<http://www.w3.org/ns/prov#value>	"irradiation, and viruses; or by internal factors such as hormones or natural metabolic" .