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_17282875_3 (team__number2 VARCHAR)
### Question:
When they played Universidad de Chile, what was the score of the first leg?
### Answer:
SELECT COUNT(1 AS st_leg) FROM table_17282875_3 WHERE team__number2 = "Universidad de Chile"