user: Question: Which Try diff has Tries for of 12?
Columns: ['Team', 'Tries for', 'Tries against', 'Try diff', 'Points for', 'Points against', 'Points diff']
Types: ['text', 'real', 'real', 'text', 'real', 'real', 'text']
Sample row: ['Narbonne', 32.0, 13.0, '+19', 228.0, 98.0, '+130']
SQL:

assistant: SELECT "Try diff" FROM "Table" WHERE "Tries for" = 12.0;