Question: Which hospital, St. Elizabeths Hospital or Howard University Hospital, opened in 1855 as the first federally operated psychiatric hospital in the United States?
Sentence (from "Howard University Hospital"): The hospital has served the African American community in the area for over 150 years, having been established in 1862 to cater for the medical needs of the thousands of African Americans who came to Washington during the Civil War, seeking their freedom.
Relevant evidence: No