What class is the verb wich its part 3 is heldu
CREATE TABLE "north_germanic" (
  "class" text,
  "part_1" text,
  "part_2" text,
  "part_3" text,
  "part_4" text,
  "verb_meaning" text
);
SELECT "class" FROM "north_germanic" WHERE "part_3"='heldu';