Question: Frederick Robinson Koch ( born August 26, 1933) is an American collector and philanthropist, the eldest of the four sons born to which American industrialist chemical engineer and entrepreneur who founded the oil refinery firm that later became Koch Industries?
Sentence (from "Koch family foundations"): The most prominent of these are the Charles Koch Foundation and the David H. Koch Charitable Foundation, created by Charles Koch and David Koch, two sons of Fred C. Koch who own the majority of Koch Industries, an oil, gas, paper, and chemical conglomerate which is the US's second-largest privately held company.
Relevant evidence: No