<http://webisa.webdatacommons.org/prov/377434067>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/312178586> .
<http://webisa.webdatacommons.org/312178586>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/312178586>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<doctorsofbangladesh.com> .
<http://webisa.webdatacommons.org/312178586>	<http://www.w3.org/ns/prov#value>	"At this point, our best options continue to be purification stills, purification tablets and various other evaporation and ozonation technologies (as are commonly found in Thailand and other parts of Asia)." .