<http://webisa.webdatacommons.org/219610091>	<http://www.w3.org/ns/prov#value>	"Two formulas such as 9 + x and x + 9" .
<http://webisa.webdatacommons.org/219610091>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/472358250>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/219610091> .
<http://webisa.webdatacommons.org/219610091>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<well.com> .