user: ### NOW ANSWER:
Question: When gniazdo is polish what is proto-slavic?
Columns: ['Proto-Slavic', 'Russian', 'Ukrainian', 'Belarusian', 'Polish', 'Czech', 'Slovak', 'Slovene', 'Serbo-Croatian', 'Bulgarian', 'Macedonian']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['*uxo (ear)', 'ухо (úkho)', 'вухо (vúkho)', 'вуха (vúkha)', 'ucho', 'ucho', 'ucho', 'uho', 'уво / uvo; uho', 'ухо (ukhó)', 'уво (úvo)']
SQL:

assistant: SELECT "Proto-Slavic" FROM "Table" WHERE "Polish" = 'gniazdo';