user: Question: Running back Aaron Green went to Nebraska and what high school? 
Columns: ['Player', 'Position', 'School', 'Hometown', 'College']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Cody Kessler', 'Quarterback', 'Centennial High School', 'Bakersfield, California', 'Southern California']
SQL:

assistant: SELECT "School" FROM "Table" WHERE "Position" = 'Running back' AND "College" = 'Nebraska';