What is the Competition for Season 2002 03, and the Opponent was zenit st. petersburg?
CREATE TABLE table_43371 (
    "Season" text,
    "Competition" text,
    "Round" text,
    "Opponent" text,
    "Series" text
)
SELECT "Competition" FROM table_43371 WHERE "Season" = '2002–03' AND "Opponent" = 'zenit st. petersburg'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What is the Competition for Season 2002 03, and the Opponent was zenit st. petersburg? ### Input: CREATE TABLE table_43371 (
    "Season" text,
    "Competition" text,
    "Round" text,
    "Opponent" text,
    "Series" text
) ### Response: SELECT "Competition" FROM table_43371 WHERE "Season" = '2002–03' AND "Opponent" = 'zenit st. petersburg'