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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:153163913
rdf:type
prov:Entity
prov:value
the SIOC ontology might be what you are looking for. its purpose is to express information about blogs, forums, wikis and other kinds of social media sites.
prov:wasQuotedFrom
n4:com
Subject Item
isap:197323225
prov:wasDerivedFrom
isa:153163913
Subject Item
isap:203132071
prov:wasDerivedFrom
isa:153163913