Complex sentence: Money flow displayed through Where's George was used in a 2006 research paper published by theoretical physicist Dirk Brockmann and coworkers that described statistical laws of human travel in the United States, and developed a mathematical model of the spread of infectious disease resulting from such travel.
Split into simpler sentences: Money flow displayed through "Where's George" was used in a 2006 research paper published by theoretical physicist Dirk Brockmann and his coworkers. The paper described statistical laws of human travel in the United States, and developed a mathematical model of the spread of infectious disease resulting from such travel.