user: Question: When was the delevery date when there were 12 ways of delivery?
Columns: ['Yard Name', 'Location (city, state)', '1st Ship Delivery Date', 'Ship Types Delivered', 'Total Number of Ways', 'total vessels built']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Moore Dry Dock Company', 'Oakland, California', 'July 1940', 'C2 type, R2 type, C3 type', '4 ways', '__ ships for USMC (remainder for USN)']
SQL:

assistant: SELECT "1st Ship Delivery Date" FROM "Table" WHERE "Total Number of Ways" = '12 ways';