About: http://webisa.webdatacommons.org/50855852

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	Therefore the opportunity of producing a mask of the correct size and configuration and particularly one which will be proof against accidental or delibrate removal by the infant, presents a substantial problem unsolved to date.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com.au