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_29535057_4 (challenge_leader VARCHAR, winner VARCHAR)
### Question:
How many challenge leaders were there of the games won by virginia (87-79)?
### Answer:
SELECT COUNT(challenge_leader) FROM table_29535057_4 WHERE winner = "Virginia (87-79)"