CREATE TABLE table_27180 ("Year" TEXT, "Amiga demo" TEXT, "PC demo" TEXT, "C64 demo" TEXT, "Amiga intro" TEXT, "PC intro" TEXT)

What won est pc intro when 4k0 (polka brothers) won best amiga intro?
SELECT "PC intro" FROM table_27180 WHERE "Amiga intro" = '4k0 (Polka Brothers)'
SELECT "PC intro" FROM "table_27180" WHERE "Amiga intro" = '4k0 (Polka Brothers)'