Complex sentence: On July 31,2009, President Barack Obama nominated Nguyen to a seat on the United States District Court for the Central District of California, vacated when Nora Margaret Manella left the federal judiciary to join the California Courts of Appeal in 2006.
Split into simpler sentences: On July 31,2009, President Barack Obama nominated Nguyen to a seat on the United States District Court for the Central District of California. She is filling the seat vacated when Nora Margaret Manella left the federal judiciary to join the California Courts of Appeal in 2006.