Complex sentence: Weekday midday and Saturday express service was discontinued on March 20,1954; weekday midday express service was restored on November 29,1971, but was again discontinued by August 29,1975.
Split into simpler sentences: Weekday midday and Saturday express service was discontinued March 20,1954. However weekday midday express service was restored November 29,1971, but was again discontinued August 29,1975.