<http://webisa.webdatacommons.org/prov/92745003>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/3574849> .
<http://webisa.webdatacommons.org/3574849>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/3574849>	<http://www.w3.org/ns/prov#value>	"Is there such a thing as a Black Hole or is the center of the galaxy something else like heavy-matter that creates a hub of a wheel that all ordinary matter spins around through its gravitational vortex?" .
<http://webisa.webdatacommons.org/3574849>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<harvard.edu> .