About: http://webisa.webdatacommons.org/302119185

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	This usually occurs 12-36 months after radiation in a patch of scar tissue and is frequently caused by a scratch or other break in the mucous membrane.
http://www.w3.org/ns/prov#wasQuotedFrom	oncolink.org