<http://webisa.webdatacommons.org/432713101>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<essayempire.com> .
<http://webisa.webdatacommons.org/432713101>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/33015995>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/432713101> .
<http://webisa.webdatacommons.org/prov/357164912>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/432713101> .
<http://webisa.webdatacommons.org/432713101>	<http://www.w3.org/ns/prov#value>	"Ruby lasers were used as early as 1961 in retinal surgery and are today used mainly in surgery and scientific research, and increasingly for micromachining." .