Question: Ellis Island, the gateway for over 12 million immigrants to the United States as the nation's busiest immigrant inspection station and where social worker Ludmila Foxlee was employed from 1920 to 1937, was made part of which National Monument in 1965?
Sentence (from "Ludmila Foxlee"): Employed by the YWCA after World War I, Foxlee spent time in Czechslovakia to assist in rebuilding efforts before working at Ellis Island from 1920 to 1937.
Relevant evidence: Yes