user: Question: Which builder has a fleet series of S057-S061?
Columns: ['Year', 'Builder', 'Model', 'Length (ft)', 'Propulsion', 'Fleet series', 'Total', 'Notes']
Types: ['text', 'text', 'text', 'real', 'text', 'text', 'text', 'text']
Sample row: ['N/A', 'Ford', 'E450', 25.0, 'Diesel', 'S002-S056, S062-S102', '92', 'Commercial Body Builders Ltd Polar V body']
SQL:

assistant: SELECT "Builder" FROM "Table" WHERE "Fleet series" = 'S057-S061';