user: Question: Which county has a median family income of $50,227?
Columns: ['County', 'Per capita income', 'Median household income', 'Median family income', 'Population', 'Number of households']
Types: ['text', 'text', 'text', 'text', 'real', 'real']
Sample row: ['Delaware', '$40,682', '$87,908', '$101,698', 174214.0, 62760.0]
SQL:

assistant: SELECT "County" FROM "Table" WHERE "Median family income" = '$50,227';