About: http://webisa.webdatacommons.org/198927319

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	Do not use exception processing or regular expressions to determine if the string is a valid number. (We will do this in a later assignment!) By checking for digits only, you will not allow a decimal point or a negative sign.
http://www.w3.org/ns/prov#wasQuotedFrom	javaprogrammingforums.com