"Guglielmo Gratarolo or Grataroli or Guilelmus Gratarolus (16 May 1516, Bergamo - 16 April 1568, Basel) was an Italian doctor and alchemist." - (en.wikipedia.org 27.03.2022)
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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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