Complex sentence: On October 7,2009, a ceremony was held at the cemetery from 2:30 to 4:30 p.m. to commemorate the bicentennial of Lewis's death and a bust of Lewis was presented to the National Park Service, which manages the site.
Split into simpler sentences: On October 7,2009, a ceremony was held at the cemetery to commemorate the bicentennial of Lewis's death. A bust of Lewis was presented to the National Park Service, which manages the site.