About: http://webisa.webdatacommons.org/270915262

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	You need to indicate to the user when there is a problem, i.e., highlight the input with a red background, or display an error popup, etc.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com