user: Question: What is the lowest Ovrs, when Wkts is greater than 13, and when Econ is less than 3.21?
Columns: ['Player', 'Wkts', 'Runs', 'Econ', 'Ovrs']
Types: ['text', 'real', 'real', 'real', 'real']
Sample row: ['Brett Lee', 18.0, 427.0, 3.21, 132.4]
SQL:

assistant: SELECT MIN("Ovrs") FROM "Table" WHERE "Wkts" > 13.0 AND "Econ" < 3.21;