user: Question: In what year was the NFL team in Chicago Illinois established?
Columns: ['Team', 'City', 'State/Province', 'League', 'Est.']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Anaheim Ducks', 'Anaheim', 'California', 'NHL', '1993']
SQL:

assistant: SELECT "Est." FROM "Table" WHERE "State/Province" = 'Illinois' AND "City" = 'Chicago' AND "League" = 'NFL';