<http://webisa.webdatacommons.org/prov/231473273>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/166102920> .
<http://webisa.webdatacommons.org/166102920>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/166102920>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<bio-medicine.org> .
<http://webisa.webdatacommons.org/prov/435301479>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/166102920> .
<http://webisa.webdatacommons.org/166102920>	<http://www.w3.org/ns/prov#value>	"This is why before vaccines were developed, childhood diseases such as measles and mumps occurred only once in a lifetime." .