<http://webisa.webdatacommons.org/prov/335531591>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/2099716> .
<http://webisa.webdatacommons.org/2099716>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/2099716>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<stackoverflow.com> .
<http://webisa.webdatacommons.org/2099716>	<http://www.w3.org/ns/prov#value>	"Normally I use GridView's selected index changed event to do all kinds of operations when user clicks select button." .