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_30 (association VARCHAR, horse_1 VARCHAR)
### Question:
With which association did estribillo ii run as Horse 1?
### Answer:
SELECT association FROM table_name_30 WHERE horse_1 = "estribillo ii"