<http://webisa.webdatacommons.org/158291770>	<http://www.w3.org/ns/prov#value>	"Unfortunately, the singing of Baroque and Classical music, especially opera, remains unimproved." .
<http://webisa.webdatacommons.org/prov/373240537>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/158291770> .
<http://webisa.webdatacommons.org/158291770>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/96422139>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/158291770> .
<http://webisa.webdatacommons.org/158291770>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<york.ac.uk> .