About: http://webisa.webdatacommons.org/147544614

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	These materials may irritate and even cause chemical burns to soft tissue, such as gingiva or gums surrounding the tooth.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com