user: Question: What team with a Game smaller than 18 has the lowest Goal Gain?
Columns: ['Team', 'Game', 'Draw', 'Loss', 'Goal Gain', 'Goal Loss', 'Goal Diff', 'Point']
Types: ['text', 'real', 'real', 'real', 'real', 'real', 'real', 'real']
Sample row: ['Sun Hei', 18.0, 2.0, 2.0, 47.0, 18.0, 29.0, 44.0]
SQL:

assistant: SELECT MIN("Goal Gain") FROM "Table" WHERE "Game" < 18.0;