![](data/smb/resources/images/201807/100h_21141719231.jpg)
"Friedrich Heinrich Albert Wangerin (November 18, 1844 – October 25, 1933) was a German mathematician." - (en.wikipedia.org 03.09.2020)
(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.)