user: Question: What are average launches with 0 failures, rocket of soyuz, and less than 12 successes?
Columns: ['Rocket', 'Country', 'Family', 'Launches', 'Successes', 'Failures', 'Partial failures']
Types: ['text', 'text', 'text', 'real', 'real', 'real', 'real']
Sample row: ['Ariane 5', 'Europe', 'Ariane', 6.0, 6.0, 0.0, 0.0]
SQL:

assistant: SELECT AVG("Launches") FROM "Table" WHERE "Failures" = 0.0 AND "Rocket" = 'soyuz' AND "Successes" < 12.0;