What is the sum of the assists kang jae-soon had in the k-league competition in ulsan?
CREATE TABLE "members" (
  "name" text,
  "date" text,
  "goals" real,
  "assists" real,
  "team" text,
  "venue" text,
  "opponent" text,
  "competition" text,
  "total_gs" real,
  "total_as" real
);
SELECT SUM("assists") FROM "members" WHERE "venue"='ulsan' AND "competition"='k-league' AND "name"='kang jae-soon';