user: Question: What are the titles of segment a for series episode 21-12?
Columns: ['Series Ep.', 'Episode', 'Segment A', 'Segment B', 'Segment C', 'Segment D']
Types: ['text', 'real', 'text', 'text', 'text', 'text']
Sample row: ['21-01', 261.0, 'Rubber Gloves', 'Soap Carvings', 'Aircraft Cabinets', 'Motorcycle Brake Locks']
SQL:

assistant: SELECT "Segment A" FROM "Table" WHERE "Series Ep." = '21-12';