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<http://webisa.webdatacommons.org/prov/218011353>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/30977282> .
<http://webisa.webdatacommons.org/30977282>	<http://www.w3.org/ns/prov#value>	"For example, implanted intraocular lenses were widely used in some countries, such as Lithuania, but seldom in China." .
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