<http://webisa.webdatacommons.org/prov/380807521>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/44390924> .
<http://webisa.webdatacommons.org/44390924>	<http://www.w3.org/ns/prov#value>	"equations and mathematical problems ??? and all other kinds of work." .
<http://webisa.webdatacommons.org/44390924>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<archive.org> .
<http://webisa.webdatacommons.org/44390924>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .