About: http://webisa.webdatacommons.org/230133839

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	What poisonous metal used by hat manufacturers in the 19th century brought on hallucinations and other psychotic symptoms, giving rise to the saying ???mad as a hatter????-10.
http://www.w3.org/ns/prov#wasQuotedFrom	gameboomers.com