"Friedrich Wilhelm Marpurg (21 November 1718 – 22 May 1795) was a German music critic, music theorist and composer. He was friendly and active with many figures of the Enlightenment of the 18th century." - (en.wikipedia.org 29.01.2020)
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.)
)