What is the smallest rank number of those used to rank the islands?
CREATE TABLE table_19033 (
    "Rank" real,
    "Islands Name" text,
    "Area (sqmi)" real,
    "Area (km 2 )" real,
    "Location" text,
    "Population (2000)" text
)
SELECT MIN("Rank") FROM table_19033
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 smallest rank number of those used to rank the islands? ### Input: CREATE TABLE table_19033 (
    "Rank" real,
    "Islands Name" text,
    "Area (sqmi)" real,
    "Area (km 2 )" real,
    "Location" text,
    "Population (2000)" text
) ### Response: SELECT MIN("Rank") FROM table_19033