sentences:  In 2006, Preckwinkle decided to paint over two 36-year-old, neglected and severely damaged public murals in the 47th Street Metra underpass.The murals had been created by graffiti artists, working with permission from the Chicago Department of Cultural Affairs, and had represented themes that included Latin-American, African, Mayan, Indian, and Native American spiritual practices.The walls were later covered with murals that were newly commissioned by the city