user: Question: Name the median income for age band being Under 20
Columns: ['Age band', 'Median income', 'Mean income', 'Median income (men)', 'Mean income (men)', 'Median income (women)', 'Mean income (women)']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Under 20', '£ 8,130', '£ 9,570', '£ 8,490', '£ 9,810', '£ 7,990', '£ 9,250']
SQL:

assistant: SELECT "Median income" FROM "Table" WHERE "Age band" = 'Under 20';