how many different teams did the broncos play against ?
CREATE TABLE table_203_371 (
    id number,
    "round" number,
    "opponent" text,
    "result" text,
    "bro." number,
    "opp." number,
    "date" text,
    "venue" text,
    "crowd" number,
    "position" text
)
SELECT COUNT(DISTINCT "opponent") FROM table_203_371
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: how many different teams did the broncos play against ? ### Input: CREATE TABLE table_203_371 (
    id number,
    "round" number,
    "opponent" text,
    "result" text,
    "bro." number,
    "opp." number,
    "date" text,
    "venue" text,
    "crowd" number,
    "position" text
) ### Response: SELECT COUNT(DISTINCT "opponent") FROM table_203_371