Question: When was the company that owned the City of Denver sold to its employees?
Sentence (from "Chicago and North Western Transportation Company"): The railroad operated more than 5,000 miles (8,000 km) of track as of the turn of the 20th century, and over 12,000 miles (19,000 km) of track in seven states before retrenchment in the late 1970s.
Relevant evidence: No