About: http://webisa.webdatacommons.org/446687408

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	on the net and found that several sites offer ivory, mostly referred to as vintage, including ebay, but also e.g. here, here and here.
http://www.w3.org/ns/prov#wasQuotedFrom	peter-pho2.com