<http://webisa.webdatacommons.org/prov/413131352>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/199677144> .
<http://webisa.webdatacommons.org/199677144>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/199677144>	<http://www.w3.org/ns/prov#value>	"Most simply, physical barriers prevent pathogens such as bacteria and viruses from entering the organism." .
<http://webisa.webdatacommons.org/prov/297242492>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/199677144> .
<http://webisa.webdatacommons.org/199677144>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<reference.com> .