user: ### NOW ANSWER:
Question: How many households are in Highlands county?
Columns: ['County', 'Per capita income', 'Median household income', 'Median family income', 'Population', 'Number of households']
Types: ['text', 'text', 'text', 'text', 'real', 'real']
Sample row: ['Collier', '$37,046', '$58,106', '$68,556', 321520.0, 133179.0]
SQL:

assistant: SELECT AVG("Number of households") FROM "Table" WHERE "County" = 'Highlands';