user: Question: What time did the game featuring the Detroit Lions at Three Rivers Stadium occur?
Columns: ['Week', 'Date', 'Opponent', 'Location', 'Time ( ET )', 'Result', 'Record']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'Sun. Sep. 6', 'at Houston Oilers', 'Astrodome', '1:00pm', 'W 29–24', '1–0']
SQL:

assistant: SELECT "Time ( ET )" FROM "Table" WHERE "Location" = 'Three Rivers Stadium' AND "Opponent" = 'Detroit Lions';