<http://webisa.webdatacommons.org/prov/60197240>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/293414951> .
<http://webisa.webdatacommons.org/293414951>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<usda.gov> .
<http://webisa.webdatacommons.org/293414951>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/293414951>	<http://www.w3.org/ns/prov#value>	"In general, pretreatment methods can be classified into three categories, including physical, chemical, and biological pretreatment." .