CREATE TABLE table_57200 ("Type of sign" CLOB, "Shape" CLOB, "Border" CLOB, "Background colour" CLOB, "Text/Symbol" CLOB)

Which sign has a red border and a warning sign?
SELECT "Text/Symbol" FROM table_57200 WHERE "Border" = 'red' AND "Type of sign" = 'warning'
SELECT "Text/Symbol" FROM "table_57200" WHERE "Border" = 'red' AND "Type of sign" = 'warning'