Complex sentence: The 1952 Democratic National Convention was held at the International Amphitheatre in Chicago, Illinois from July 21 to July 26,1952, the same coliseum the Republicans had gathered in a few weeks earlier.
Split into simpler sentences: The 1952 Democratic National Convention was held at the International Amphitheatre in Chicago, Illinois from July 21 to July 26,1952. The convention met in the same coliseum the Republicans had gathered in a few weeks earlier.