Question: When did Constantin Von Ettingshausen's father die?
Sentence (from "Constantin von Ettingshausen"): Constantin Freiherr von Ettingshausen (or Baron Constantin von Ettingshausen) (16 June 1826 in Vienna – 1 February 1897 in Graz) was an Austrian botanist known for his paleobotanical studies of flora from the Tertiary era.
Relevant evidence: No