user: Question: What is the density when simplified shows 南山区?
Columns: ['English Name', 'Simplified', 'Traditional', 'Pinyin', 'Area', 'Population', 'Density']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['English Name', 'Simplified', 'Traditional', 'Pinyin', 'Area', 'Population', 'Density']
SQL:

assistant: SELECT "Density" FROM "Table" WHERE "Simplified" = '南山区';