About: http://webisa.webdatacommons.org/161860579

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	A challenge is defined as a formal, written complaint filed with a library or school requesting that a book or other material be restricted or removed because of its content or appropriateness.
http://www.w3.org/ns/prov#wasQuotedFrom	atyourlibrary.org