user: ### NOW ANSWER:
Question: Which street is 12.2 miles long?
Columns: ['County', 'Location', 'Street Names', 'Milepost', 'Roads Intersected', 'Notes']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Norfolk', 'Stoughton', 'Pleasant Street Turnpike Street Lindelof Avenue', '3.0', 'Route 24', 'Route 24 Exit 20.']
SQL:

assistant: SELECT "Street Names" FROM "Table" WHERE "Milepost" = '12.2';