Complex sentence: Keating's plan also specified a circular fountain that was not built until 1905, and which was removed to make way for the Cenotaph, officially unveiled on July 1,1929 by Sir Robert Borden.
Split into simpler sentences: Keating's plan also specified a circular fountain that was not built until 1905. It was removed to make way for the Cenotaph, officially unveiled on July 1,1929 by Sir Robert Borden.