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_18143210_2 (first_season_in_top_division VARCHAR, club VARCHAR)
### Question:
When did the club UNAM played the first season in top division?
### Answer:
SELECT first_season_in_top_division FROM table_18143210_2 WHERE club = "UNAM"