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_name_45 (first_elected VARCHAR, result VARCHAR, district VARCHAR)
### Question:
Who was first elected as the result of a retired republican gain in the district of ohio 21?
### Answer:
SELECT first_elected FROM table_name_45 WHERE result = "retired republican gain" AND district = "ohio 21"