[['United States', 'ETHNIC_GROUP', 'Native Americans in the United States'], ['United States', 'LANGUAGE', 'English language'], ['United States', 'LEADER_TITLE', 'President of the United States'], ['United States', 'LEADER_NAME', 'John Roberts'], ['250 Delaware Avenue', 'LOCATION', 'United States']]
250 Delaware Avenue is located within the United States where English is the language and the Native Americans are an ethnic group. John Roberts is a leader in the United States where the country's leader is titled the President of the United States.