"Johann Frederick I (German: Johann Friedrich I; 30 June 1503 in Torgau – 3 March 1554 in Weimar), called Johann the Magnanimous, was Elector of Saxony (1532-1547) and head of the Schmalkaldic League." - (en.wikipedia.org 31.10.2019)
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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.)