Complex sentence: The spur was built in 1928 and was called West Shore Line by the Baltimore and Ohio Railroad (B&O), which owned the Staten Island Rapid Transit, in order to deliver building materials to the Outerbridge Crossing construction site near the Kill.
Split into simpler sentences: The spur was built in the mid- 1920s and was called West Shore Line by the Baltimore and Ohio Railroad (B&O), which owned the Staten Island Rapid Transit. The B&O delivered building materials to the Outerbridge Crossing construction site near the Kill.