Complex sentence: Knowing that his daughter will survive, President Wilson remains in Washington D.C. to address the nation for the last time before he, along with millions of people, die in earthquakes and tsunamis worldwide.
Split into simpler sentences: Knowing that his daughter will survive, President Wilson remains in Washington D.C. to address the nation for the last time before. He, along with millions of people, die in earthquakes and tsunamis worldwide.