Complex sentence: IER service on the 7th St. line was abandoned in March, 1941, but the track on 7th St. from Broadway to Pine St. was put back in service during World War II to enable streetcars of the Key System to reach several defense installations.
Split into simpler sentences: IER service on the 7th St. line was abandoned in March, 1941. The track on 7th St. from Broadway to Pine St. was put back in service during World War II to enable streetcars of the Key System to reach several defense installations.