Kaluvanchikudy is the main town in what DS division?
CREATE TABLE table_72311 (
    "DS Division" text,
    "Main Town" text,
    "Divisional Secretary" text,
    "GN Divisions" real,
    "Area (km 2 )" real,
    "Sri Lankan Tamil" real,
    "Sri Lankan Moors" real,
    "Sinhalese" real,
    "Burgher" real,
    "Other" real,
    "Total" real,
    "Population Density (/km 2 )" real
)
SELECT "DS Division" FROM table_72311 WHERE "Main Town" = 'Kaluvanchikudy'
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: Kaluvanchikudy is the main town in what DS division? ### Input: CREATE TABLE table_72311 (
    "DS Division" text,
    "Main Town" text,
    "Divisional Secretary" text,
    "GN Divisions" real,
    "Area (km 2 )" real,
    "Sri Lankan Tamil" real,
    "Sri Lankan Moors" real,
    "Sinhalese" real,
    "Burgher" real,
    "Other" real,
    "Total" real,
    "Population Density (/km 2 )" real
) ### Response: SELECT "DS Division" FROM table_72311 WHERE "Main Town" = 'Kaluvanchikudy'