What is the population density for the city of lubang?
CREATE TABLE table_73904 (
    "Municipality" text,
    "No. of Barangays" real,
    "Area (km\u00b2)" text,
    "Population (2010)" real,
    "Pop. density (per km\u00b2)" text,
    "Income Class (2004)" text
)
SELECT COUNT("Pop. density (per km\u00b2)") FROM table_73904 WHERE "Municipality" = 'Lubang'
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 population density for the city of lubang? ### Input: CREATE TABLE table_73904 (
    "Municipality" text,
    "No. of Barangays" real,
    "Area (km\u00b2)" text,
    "Population (2010)" real,
    "Pop. density (per km\u00b2)" text,
    "Income Class (2004)" text
) ### Response: SELECT COUNT("Pop. density (per km\u00b2)") FROM table_73904 WHERE "Municipality" = 'Lubang'