CREATE TABLE table_200_33 (id NUMBER, "district" CLOB, "area size\ ( km2 ) " CLOB, "population" CLOB, "density\ per km2" NUMBER)

what is the combined area size of the yamato flat inland plain and the yamato highland ?
SELECT SUM("area size\n(km2)") FROM table_200_33 WHERE "district" IN ('yamato flat inland plain', 'yamato highland')
SELECT SUM("area size\n(km2)") FROM "table_200_33" WHERE "district" IN ('yamato flat inland plain', 'yamato highland')