Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_26757_4 (proto_slavic VARCHAR, polish VARCHAR)
### Question:
When gniazdo is polish what is proto-slavic?
### Answer:
SELECT proto_slavic FROM table_26757_4 WHERE polish = "gniazdo"