user: Question: What city was completed in 1910-1978?
Columns: ['Area in m²', 'Completion', 'City', 'Country', 'Denomination']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['20,139 (interior 15,160 )', '1506–1626', 'Vatican City', 'Vatican City', 'Roman Catholic']
SQL:

assistant: SELECT "City" FROM "Table" WHERE "Completion" = '1910-1978';