what is the total number of circuits listed on the chart ?
CREATE TABLE table_204_210 (
    id number,
    "rnd" number,
    "circuit" text,
    "lmp1 winning team\nlmp1 winning drivers" text,
    "lmp2 winning team\nlmp2 winning drivers" text,
    "gt1 winning team\ngt1 winning drivers" text,
    "gt2 winning team\ngt2 winning drivers" text,
    "results" text
)
SELECT COUNT(DISTINCT "circuit") FROM table_204_210
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 total number of circuits listed on the chart ? ### Input: CREATE TABLE table_204_210 (
    id number,
    "rnd" number,
    "circuit" text,
    "lmp1 winning team\nlmp1 winning drivers" text,
    "lmp2 winning team\nlmp2 winning drivers" text,
    "gt1 winning team\ngt1 winning drivers" text,
    "gt2 winning team\ngt2 winning drivers" text,
    "results" text
) ### Response: SELECT COUNT(DISTINCT "circuit") FROM table_204_210