About: http://webisa.webdatacommons.org/137380948

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	But smiling appears to me as being subjective (I mean the opinion of whether a smile is a good smile or not), so at least a machine gives clear rules and unbiased opinion, based on the sole physical caracterictics of the face.
http://www.w3.org/ns/prov#wasQuotedFrom	techdirt.com