who is the opponent in the final when the year is before 1883?
CREATE TABLE "singles_5" (
  "outcome" text,
  "year" real,
  "tournament" text,
  "surface" text,
  "opponent_in_the_final" text,
  "score" text
);
SELECT "opponent_in_the_final" FROM "singles_5" WHERE "year"<1883;