CREATE TABLE table_name_74 (density NUMBER, population_2011_census VARCHAR2)

What is the lowest density of a town with a 13,708 2011 population census ?
SELECT MIN(density) FROM table_name_74 WHERE population_2011_census = 13 OFFSET 708
SELECT MIN("density") FROM "table_name_74" WHERE "population_2011_census" = 13 OFFSET 708 ROWS