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PrefixNamespace IRI
isaphttp://webisa.webdatacommons.org/prov/
isahttp://webisa.webdatacommons.org/
n4stackoverflow.
rdfhttp://www.w3.org/1999/02/22-rdf-syntax-ns#
provhttp://www.w3.org/ns/prov#
xsdhhttp://www.w3.org/2001/XMLSchema#
Subject Item
isa:97788354
rdf:type
prov:Entity
prov:value
If you have multiple forms on the page, you might have to implement such a solution, especially if focus often is not on one of the form elements of the default form (well, he is what I remember from having to do something like this over 4 years ago).
prov:wasQuotedFrom
n4:com
Subject Item
isap:298817867
prov:wasDerivedFrom
isa:97788354