user: Question: What's the Year Average that has a Power of bhp (kW) and Trim of LS/2LT?
Columns: ['Year', 'Trim', 'Engine', 'Power', 'Torque', 'EPA (2008) City']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [2006.0, 'LS/LT', 'L (cuin) Ecotec L61 I4', 'bhp (kW)', 'lb·ft (N·m)', 'mpg-US (L/100km; mpg-imp)']
SQL:

assistant: SELECT AVG("Year") FROM "Table" WHERE "Power" = 'bhp (kW)' AND "Trim" = 'LS/2LT';