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_66 (round INTEGER, loser VARCHAR)
### Question:
What was the average number of rounds in the fight where Tank Abbott lost?
### Answer:
SELECT AVG(round) FROM table_name_66 WHERE loser = "tank abbott"