user: Question: What is the average land area with a density of 815.48, and a Population larger than 411?
Columns: ['Urban area (locality)', 'Population', 'Land area (hectares)', 'Density (inh./km²)', 'Code']
Types: ['text', 'real', 'real', 'real', 'real']
Sample row: ['Abbekås', 729.0, 90.6, 804.64, 3300.0]
SQL:

assistant: SELECT AVG("Land area (hectares)") FROM "Table" WHERE "Density (inh./km²)" = 815.48 AND "Population" > 411.0;