"Frederick Francis I (10 December 1756 – 1 February 1837) ruled over the German state of Mecklenburg-Schwerin, first as duke (1785–1815), and then as grand duke (1815–1837)." - (en.wikipedia.org 09.11.2019)
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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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