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<http://webisa.webdatacommons.org/prov/389054290>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/336915976> .
<http://webisa.webdatacommons.org/336915976>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<wdhospital.com> .
<http://webisa.webdatacommons.org/336915976>	<http://www.w3.org/ns/prov#value>	"Causes, incidence, and risk factors: A lower esophageal ring is a matter of debate can be caused from swallowing dangerous acids or other corrosive materials." .