user: Question: How many different starts had an average finish of 17.9?
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: [1981.0, 22.0, 1.0, 5.0, 12.0, 1.0, '14.5', '14.6', '$152,855', '21st', '#47 Race Hill Farm Team']
SQL:

assistant: SELECT COUNT("Starts") FROM "Table" WHERE "Avg. Finish" = '17.9';