user: Question: WHAT IS THE LOWEST $50-1/2 OZ COIN WITH A 1997 YEAR AND $25-1/4 OZ LARGER THAN $27100?
Columns: ['Year', '$10 – 1/10 oz.', '$25 – 1/4 oz.', '$50 – 1/2 oz.', '$100 – 1 oz.']
Types: ['real', 'text', 'real', 'real', 'text']
Sample row: [1997.0, '70,250', 27100.0, 20500.0, '56,000']
SQL:

assistant: SELECT MIN("$50 – 1/2 oz.") FROM "Table" WHERE "Year" = 1997.0 AND "$25 – 1/4 oz." > 27100.0;