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_68 (season VARCHAR, opponent VARCHAR)
### Question:
What is the Season when the Opponent was zenit st. petersburg?
### Answer:
SELECT season FROM table_name_68 WHERE opponent = "zenit st. petersburg"