user: Question: What was the earliest week the Titans played at Ford Field?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Game site', 'Record']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'September 7', 'Jacksonville Jaguars', 'W 17–10', 'LP Field', '1–0']
SQL:

assistant: SELECT MIN("Week") FROM "Table" WHERE "Game site" = 'Ford Field';