who is the grand finalist when the grand finalists are jonathan loh, peterson poon, nathan santos?
CREATE TABLE "past_champions_and_grand_finalists" (
  "year" real,
  "champion" text,
  "grand_finalist" text,
  "champion_team_members" text,
  "grand_finalists" text
);
SELECT "grand_finalist" FROM "past_champions_and_grand_finalists" WHERE "grand_finalists"='jonathan loh, peterson poon, nathan santos';