"Duke John Frederick of Saxe-Weimar (19 September 1600 in Altenburg – 17 October 1628 in Weimar) was a Duke of Saxe-Weimar." - (en.wikipedia.org 31.01.2020)
en
(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.)