"Ernest Casimir I (22 December 1573 – 2 June 1632) was a Count of Nassau-Dietz and Stadtholder of Friesland, Groningen and Drenthe." - (en.wikipedia.org 31.01.2020)
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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.)