CREATE TABLE table_75330 ("Rank" FLOAT, "Island's Name" TEXT, "Area  ( sqmi ) " FLOAT, "Area  ( km 2  ) " FLOAT, "Location" TEXT, "Population  ( 2000 ) " TEXT)

What is the largest area in Alaska with a population of 39 and rank over 19?
SELECT MAX("Area (km 2 )") FROM table_75330 WHERE "Location" = 'alaska' AND "Population (2000)" = '39' AND "Rank" > '19'
SELECT MAX("Area (km 2 )") FROM "table_75330" WHERE "Location" = 'alaska' AND "Population (2000)" = '39' AND "Rank" > '19'