Van wie heeft u een foto op uw boksbal hangen? Extraction from NPs in Dutch

This paper presents arguments from a corpus study that confirm the claim
by Jack Hoeksema that extraction from PPs and subjects is possible in
Dutch. Hoeksema presents data involving relative clauses. but we show
that similar cases can be found in WH-questions as well. The suggestion
that these are restricted to PP-arguments of a noun is problematic,
however, as there are no clear tests for distinguishing PP-arguments of
a noun from PP-adjuncts.