generate questions: Historical aspects of the Expo line route are noteworthy. It uses the right-of-way for the Santa Monica Air Line that provided electric-powered freight and passenger service between Los Angeles and Santa Monica beginning in the 1920s. Service was discontinued in 1953 but diesel-powered freight deliveries to warehouses along the route continued until March 11, 1988. The abandonment of the line spurred concerns within the community and the entire right-of-way was purchased from Southern Pacific by Los Angeles Metropolitan Transportation Authority. The line was built in 1875 as the steam-powered Los Angeles and Independence Railroad to bring mining ore to ships in Santa Monica harbor and as a passenger excursion train to the beach.
Beginning in what decade did the Santa Monica  Expo Air Line host freight and passenger services? {sep_token} What year did the Santa Monica freight and passenger service stop running? {sep_token} Diesel powered freight deliveries continued through what date? {sep_token} What was the result from the discontinuation of using the line for deliveries? {sep_token} Who bought the Expo line from Southern Pacific? {sep_token}