This HTML5 document contains 4 embedded RDF statements represented using HTML+Microdata notation.

The embedded RDF content will be recognized by any processor of HTML5 Microdata.

PrefixNamespace IRI
isaphttp://webisa.webdatacommons.org/prov/
isahttp://webisa.webdatacommons.org/
n4codingforums.
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:244356231
rdf:type
prov:Entity
prov:value
if browser is making POST request and is uploading files, then $_FILES will be set, so you could do it like that:
prov:wasQuotedFrom
n4:com
Subject Item
isap:11886327
prov:wasDerivedFrom
isa:244356231