what is the number of channels she has appeared on ?
CREATE TABLE table_203_543 (
    id number,
    "year" text,
    "show" text,
    "role" text,
    "channel" text,
    "extra" text
)
SELECT COUNT(DISTINCT "channel") FROM table_203_543
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 number of channels she has appeared on ? ### Input: CREATE TABLE table_203_543 (
    id number,
    "year" text,
    "show" text,
    "role" text,
    "channel" text,
    "extra" text
) ### Response: SELECT COUNT(DISTINCT "channel") FROM table_203_543