user: Question: Name the avg start for avg finish of 18.3
Columns: ['Year', 'Starts', 'Wins', 'Top 5', 'Top 10', 'Poles', 'Avg. Start', 'Avg. Finish', 'Winnings', 'Position', 'Team(s)']
Types: ['real', 'real', 'real', 'real', 'real', 'real', 'text', 'text', 'text', 'text', 'text']
Sample row: [1990.0, 4.0, 0.0, 0.0, 0.0, 0.0, '27.8', '31.0', '$17,190', '49th', '#50 Ted Musgrave Racing #2 U.S. Motorsports Inc.']
SQL:

assistant: SELECT "Avg. Start" FROM "Table" WHERE "Avg. Finish" = '18.3';