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_1 (round VARCHAR, time VARCHAR)
### Question:
What is the number of rounds that took place for the fight that lasted 6:21?
### Answer:
SELECT COUNT(round) FROM table_name_1 WHERE time = "6:21"