"William Frederick (Dutch: Willem Frederik; Arnhem 7 August 1613 – Leeuwarden 31 October 1664), Count (from 1654 Imperial Prince) of Nassau-Dietz, Stadtholder of Friesland, Groningen and Drenthe." - (en.wikipedia.org 28.11.2019)
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(The left column lists the relations of this actor to objects in the right column. In the middle you find other actors in relation to the same objects.)
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