About: http://webisa.webdatacommons.org/187393248

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	Your code is a bit confusing, but suppose you had two buttons and you wanted to know which one was clicked, informing the user via the stateTextBox value:
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com