user: Question: What is the average population when deaths are 3 557 and crude death date is less than 11.9?
Columns: ['Average population (x 1000)', 'Live births', 'Deaths', 'Natural change', 'Crude birth rate (per 1000)', 'Crude death rate (per 1000)', 'Natural change (per 1000)']
Types: ['real', 'text', 'text', 'text', 'real', 'real', 'real']
Sample row: [234.0, '7 037', '5 109', '1 928', 30.1, 21.9, 8.2]
SQL:

assistant: SELECT AVG("Average population (x 1000)") FROM "Table" WHERE "Deaths" = '3 557' AND "Crude death rate (per 1000)" < 11.9;