Who was first elected as the result of a retired republican gain in the district of ohio 21?
CREATE TABLE table_name_45 (
    first_elected VARCHAR,
    result VARCHAR,
    district VARCHAR
)
SELECT first_elected FROM table_name_45 WHERE result = "retired republican gain" AND district = "ohio 21"
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: Who was first elected as the result of a retired republican gain in the district of ohio 21? ### Input: CREATE TABLE table_name_45 (
    first_elected VARCHAR,
    result VARCHAR,
    district VARCHAR
) ### Response: SELECT first_elected FROM table_name_45 WHERE result = "retired republican gain" AND district = "ohio 21"