user: ### NOW ANSWER:
Question: which year has the toyota tf102 chassis?
Columns: ['Year', 'Entrant', 'Chassis', 'Engine', 'Points']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1994.0, 'Team Lotus', 'Lotus 109', 'Mugen Honda V10', 0.0]
SQL:

assistant: SELECT COUNT("Year") FROM "Table" WHERE "Chassis" = 'toyota tf102';