user: Question: Tell me the lowest year for Shubert Theatre
Columns: ['Year', 'Play', 'Role', 'Theatre', 'Location']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1940.0, 'Liliom', 'Julie', 'Forty-Fourth Street Theater', 'New York City , New York']
SQL:

assistant: SELECT MIN("Year") FROM "Table" WHERE "Theatre" = 'Shubert Theatre';