<http://webisa.webdatacommons.org/prov/408246944>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/444164486> .
<http://webisa.webdatacommons.org/444164486>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/444164486>	<http://www.w3.org/ns/prov#value>	"This book is written mainly for professionals." .
<http://webisa.webdatacommons.org/444164486>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<hearing-voices.com> .