Question: Louis Wilson Menk, was an American railway worker and executive, he served as the last president of Northern Pacific Railway 1966-1970, before the railroad was merged into which United States-based railroad company formed from a merger of four major U.S. railroads?
Sentence (from "Louis W. Menk"): Louis Wilson Menk (born April 8, 1918 in Englewood, Colorado, died November 27, 1999) was an American railway worker and executive.
Relevant evidence: No