Complex sentence: Lausanne has a population (as of November 2015) of 146,372, making it the fourth largest city in Switzerland, with the entire agglomeration area having 420,000 inhabitants (as of March 2015).
Split into simpler sentences: Lausanne has a population (as of November 2015) of 146,372. Making it the fourth largest city in Switzerland, with the entire agglomeration area having 420,000 inhabitants (as of March 2015).