CREATE TABLE table_28988 ("Proto-Slavic" CLOB, "Russian" CLOB, "Ukrainian" CLOB, "Belarusian" CLOB, "Polish" CLOB, "Czech" CLOB, "Slovak" CLOB, "Slovene" CLOB, "Serbo-Croatian" CLOB, "Bulgarian" CLOB, "Macedonian" CLOB)

When gniazdo is polish what is proto-slavic?
SELECT "Proto-Slavic" FROM table_28988 WHERE "Polish" = 'gniazdo'
SELECT "Proto-Slavic" FROM "table_28988" WHERE "Polish" = 'gniazdo'