<http://webisa.webdatacommons.org/18291476>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<science20.com> .
<http://webisa.webdatacommons.org/prov/154125130>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/18291476> .
<http://webisa.webdatacommons.org/18291476>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/18291476>	<http://www.w3.org/ns/prov#value>	"Death is an obvious limiting factor, but anything short of death that does not impact fitness would be a zero cost, and consequently not considered altruistic." .