user: Question: Which mountains classification is listed under stage 3?
Columns: ['Stage', 'Stage winner', 'General classification', 'Points classification', 'Mountains classification', 'Asian rider classification', 'Team classification']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'Mohd Shahrul Mat Amin', 'Mohd Shahrul Mat Amin', 'Ahmad Fallanie Ali', 'not available', 'Mohd Shahrul Mat Amin', 'Malaysian Armed Forces']
SQL:

assistant: SELECT "Mountains classification" FROM "Table" WHERE "Stage" = 3.0;