i am curious, what requirements your case places on the data model.
where does one find documents which describe it?
neither the documentation
https://gitlab.com/TIBHannover/orkg/orkg-frontend/-/wikis/home
nor the api
http://tibhannover.gitlab.io/orkg/orkg-backend/api-doc/
nor the rdf dump
https://www.orkg.org/orkg/api/rdf/dump
—>
https://dydra.com/james/orkg/@query#reified-statements
https://dydra.com/james/orkg/reified-statements.html
lend any insight into your annotation requirements.
best regards, from berlin,