Complex sentence: In May 2015, Oakland International Airport's Moving Modern program construction commenced on a $100 million renovation of the Terminal 1 central building to seismic retrofit, replace and upgrade infrastructure and improve the passenger environment.
Split into simpler sentences: In May 2015, Oakland International Airport's Moving Modern program construction commenced on a $100 million renovation of the Terminal 1. The project includes seismic architectural retrofits in central buildings, replace and upgrade infrastructure and improve the passenger environment.