About: http://webisa.webdatacommons.org/200415241

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	When there is doubt, parents may send a sample to a laboratory to determine whether the sand contains tremolite or crystalline silica.
http://www.w3.org/ns/prov#wasQuotedFrom	healthychildren.org