Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: 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 )

### Question ###
Kaluvanchikudy is the main town in what DS division?

### Accurate SQL ###

SELECT "DS Division" FROM table_72311 WHERE "Main Town" = 'Kaluvanchikudy'