<http://webisa.webdatacommons.org/prov/352971039>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/321691714> .
<http://webisa.webdatacommons.org/321691714>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/321691714>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<phys.org> .
<http://webisa.webdatacommons.org/321691714>	<http://www.w3.org/ns/prov#value>	"Measuring a fuel cell's overall performance is relatively easy, but measuring its components individually as they work together is a challenge." .