Complex sentence: Prairie City was the western terminus of the Sumpter Valley Railroad which extended over Dixie Summit and Tipton to Seneca and then to Baker City; passenger train service was discontinued in 1937, freight service continued through World War II, but the line was abandoned in 1947.
Split into simpler sentences: Prairie City was the western terminus of the Sumpter Valley Railroad, which extended over Dixie Summit and Tipton to Seneca and then to Baker City; passenger train service was discontinued in 1937. Freight service continued through World War II, but the line was abandoned in 1947.