user: Question: Which sign has a Red border and a Warning sign?
Columns: ['Type of sign', 'Shape', 'Border', 'Background colour', 'Text/Symbol']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Warning', 'Triangular', 'Red', 'Yellow', 'Black']
SQL:

assistant: SELECT "Text/Symbol" FROM "Table" WHERE "Border" = 'Red' AND "Type of sign" = 'Warning';