Complex sentence: Prior to getting married, Jonathan and his first wife had regularly visited Las Vegas, drawn to the city's live entertainment scene, so when the Canadian real estate market collapsed in 2008, they relocated to the U.S. that December.
Split into simpler sentences: Prior to getting married, Jonathan and his first wife had regularly visited Las Vegas, drawn to the city's live entertainment scene. When the Canadian real estate market collapsed in 2008, they relocated to the the city that December.