<http://webisa.webdatacommons.org/159606511>	<http://www.w3.org/ns/prov#value>	"The usual form is letters, although diary entries, newspaper clippings and other documents are sometimes used.??? Bam." .
<http://webisa.webdatacommons.org/159606511>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/58652326>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/159606511> .
<http://webisa.webdatacommons.org/159606511>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<bostonoperacollaborative.org> .