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_18303274_1 (grand_prix VARCHAR, race_winner VARCHAR)
### Question:
What grand prixs did Daijiro Hiura win? 
### Answer:
SELECT grand_prix FROM table_18303274_1 WHERE race_winner = "Daijiro Hiura"