Complex sentence: On the Danbury branch there are three trains that consist of seven car sets which run a express trip into Grand Central Terminal and back on weekdays, two out of these three make locle stops between South Norwalk and Stamford.
Split into simpler sentences: On the Danbury branch there are three trains that consist of seven car sets which run an express trip into Grand Central Terminal and back on weekdays. Two out of these three make local stops between South Norwalk and Stamford.