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_81 (turnout VARCHAR, candidates VARCHAR, valid_poll VARCHAR)
### Question:
What is the turnout with 15 candidates and more than 377,591 valid poll?
### Answer:
SELECT turnout FROM table_name_81 WHERE candidates = 15 AND valid_poll > 377 OFFSET 591