What is the party for the representative who was first elected before 2002 and the results were re-elected?
CREATE TABLE "oklahoma" (
  "district" text,
  "incumbent" text,
  "party" text,
  "first_elected" real,
  "results" text
);
SELECT "party" FROM "oklahoma" WHERE "results"='re-elected' AND "first_elected"<2002;