Question: What is the date of death of the founder of Klynveld Kraayenhof & Co.?
Sentence (from "Klynveld Kraayenhof & Co."): Co. (KKC) was a Dutch accountancy firm founded in 1917 by Piet Klijnveld and Jaap Kraayenhof, who was one of Klynveld's former employees at another firm.
Relevant evidence: Yes