Question: Which town did the commander who initiated an inland discovery expedition under the leadership of Pieter Cruythoff found?
Sentence (from "Riebeek-Kasteel"): Riebeek-Kasteel is one of the oldest towns in South Africa, situated at 80 km north-east of Cape Town in The Riebeek Valley together with its sister town Riebeek West.
Relevant evidence: Yes