user: Question: What is the earliest year with a label-Nr of ST-43?
Columns: ['Year', 'Title', 'Type', 'Label', 'Label-Nr']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1961.0, 'Freedom Sound', 'Studio', 'Pacific Jazz', 'ST-27']
SQL:

assistant: SELECT MIN("Year") FROM "Table" WHERE "Label-Nr" = 'ST-43';