Complex sentence: The first phase of the scheme, which consisted of 5 stations, was begun following an act of parliament on 10th May 1929, construction began three years later in 1932 and was completed in 1936.
Split into simpler sentences: The first phase of the scheme, which consisted of five stations, was begun following an act of parliament on 10th May 1929. Construction began three years later in 1932 and was completed in 1936.