CREATE TABLE table_28990 ("Proto-Slavic" TEXT, "Russian" TEXT, "Ukrainian" TEXT, "Belarusian" TEXT, "Polish" TEXT, "Czech" TEXT, "Slovak" TEXT, "Slovene" TEXT, "Serbo-Croatian" TEXT, "Bulgarian" TEXT, "Macedonian" TEXT)

When (r ba) is the macedonian what is the proto-slavic?
SELECT "Proto-Slavic" FROM table_28990 WHERE "Macedonian" = 'риба (ríba)'
SELECT "Proto-Slavic" FROM "table_28990" WHERE "Macedonian" = 'риба (ríba)'