How many counties are at milepost 69.5?
CREATE TABLE table_3403 (
    "County" text,
    "Town/City" text,
    "Milepost" text,
    "Station" text,
    "Connections" text
)
SELECT COUNT("County") FROM table_3403 WHERE "Milepost" = '69.5'
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 counties are at milepost 69.5? ### Input: CREATE TABLE table_3403 (
    "County" text,
    "Town/City" text,
    "Milepost" text,
    "Station" text,
    "Connections" text
) ### Response: SELECT COUNT("County") FROM table_3403 WHERE "Milepost" = '69.5'