What is the Milepost of the Twin Tunnel #1 North?
CREATE TABLE table_42484 (
    "Milepost" real,
    "Name of the tunnel" text,
    "Length" text,
    "Maximum Height" text,
    "Minimum Height" text
)
SELECT COUNT("Milepost") FROM table_42484 WHERE "Name of the tunnel" = 'twin tunnel #1 north'
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 Milepost of the Twin Tunnel #1 North? ### Input: CREATE TABLE table_42484 (
    "Milepost" real,
    "Name of the tunnel" text,
    "Length" text,
    "Maximum Height" text,
    "Minimum Height" text
) ### Response: SELECT COUNT("Milepost") FROM table_42484 WHERE "Name of the tunnel" = 'twin tunnel #1 north'