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 "Burlington Northern Railroad"): The Burlington Northern Railroad (reporting mark BN) was a United States-based railroad company formed from a merger of four major U.S. railroads.
Relevant evidence: Yes