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