user: Question: Which county had 6807 households and a median family income of $49,865?
Columns: ['County', 'Per capita income', 'Median household income', 'Median family income', 'Population', 'Number of households']
Types: ['text', 'text', 'text', 'text', 'real', 'real']
Sample row: ['Ozaukee', '$39,778', '$74,996', '$90,133', 86395.0, 34228.0]
SQL:

assistant: SELECT "County" FROM "Table" WHERE "Number of households" > 6807.0 AND "Median family income" = '$49,865';