About: http://webisa.webdatacommons.org/420892539

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	validation - Is there a (built-in) way in JavaScript to check if a string is a valid number? - Stack Overflow
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com