how many marathons were held in beijing ?
CREATE TABLE table_204_880 (
    id number,
    "year" number,
    "competition" text,
    "venue" text,
    "position" text,
    "event" text,
    "notes" text
)
SELECT COUNT("competition") FROM table_204_880 WHERE "venue" = 'beijing'
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 marathons were held in beijing ? ### Input: CREATE TABLE table_204_880 (
    id number,
    "year" number,
    "competition" text,
    "venue" text,
    "position" text,
    "event" text,
    "notes" text
) ### Response: SELECT COUNT("competition") FROM table_204_880 WHERE "venue" = 'beijing'