@prefix schema: <http://schema.org/>.
@prefix foaf: <http://xmlns.com/foaf/0.1/>.
@prefix log: <http://www.w3.org/2000/10/swap/log#>.
@prefix : <http://example.org/ns#>.

(_:S) log:onNegativeSurface {
    _:S a foaf:Person.
    () log:onNegativeSurface {
        _:S a schema:Person {| log:ohyeah {_:S a foaf:Person} |}.
    }.
}.

# query
(_:S _:C) log:onQuerySurface {
    _:S a schema:Person.
}.

(_:S _:A) log:onQuerySurface {
    _:S log:ohyeah _:A
}.
