<http://webisa.webdatacommons.org/31820861>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/31820861>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<raco.cat> .
<http://webisa.webdatacommons.org/prov/38227714>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/31820861> .
<http://webisa.webdatacommons.org/31820861>	<http://www.w3.org/ns/prov#value>	"Newton???s claim that gravity is a universal force was contradicted by observations that seemed to show the stars were motionless." .