How many races is different distances does Rosehill Guineas compete in?
CREATE TABLE table_17843 (
    "Result" text,
    "Date" text,
    "Race" text,
    "Venue" text,
    "Group" text,
    "Distance" text,
    "Weight (kg)" text,
    "Jockey" text,
    "Winner/2nd" text
)
SELECT COUNT("Distance") FROM table_17843 WHERE "Race" = 'Rosehill Guineas'
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 races is different distances does Rosehill Guineas compete in? ### Input: CREATE TABLE table_17843 (
    "Result" text,
    "Date" text,
    "Race" text,
    "Venue" text,
    "Group" text,
    "Distance" text,
    "Weight (kg)" text,
    "Jockey" text,
    "Winner/2nd" text
) ### Response: SELECT COUNT("Distance") FROM table_17843 WHERE "Race" = 'Rosehill Guineas'