<http://webisa.webdatacommons.org/15762103>	<http://www.w3.org/ns/prov#value>	"The heart and historical city of Vienna, a large part of today's Innere Stadt, was a fortress and surrounded by fields in order to defend itself from potential attackers." .
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<http://webisa.webdatacommons.org/prov/298067832>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/15762103> .
<http://webisa.webdatacommons.org/15762103>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<sensagent.com> .