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_22517564_3 (starting_odds VARCHAR, opening_odds VARCHAR)
### Question:
What were the starting odds for the opening odds of 2-1?
### Answer:
SELECT starting_odds FROM table_22517564_3 WHERE opening_odds = "2-1"