<http://webisa.webdatacommons.org/55790790>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/435301478>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/55790790> .
<http://webisa.webdatacommons.org/55790790>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<igmchicago.org> .
<http://webisa.webdatacommons.org/55790790>	<http://www.w3.org/ns/prov#value>	"Question A: Declining to be vaccinated against contagious diseases such as measles imposes costs on other people, which is a negative externality." .