CREATE TABLE table_name_72 (area__km_2__ INT, place VARCHAR, population VARCHAR)

What's the most area of Bochum Part 2 with a population less than 15,911?
SELECT MAX(area__km_2__) FROM table_name_72 WHERE place = "bochum part 2" AND population < 15 OFFSET 911
SELECT MAX("area__km_2__") FROM "table_name_72" WHERE "bochum part 2" = "place" AND "population" < 15 OFFSET 911