What Score in the final has a Surface of hard, a Championship of washington, d.c. , u.s., and an Opponent in the final of ivan lendl?
CREATE TABLE "singles_40_20_20" (
  "outcome" text,
  "date" real,
  "championship" text,
  "surface" text,
  "opponent_in_the_final" text,
  "score_in_the_final" text
);
SELECT "score_in_the_final" FROM "singles_40_20_20" WHERE "surface"='hard' AND "championship"='washington, d.c. , u.s.' AND "opponent_in_the_final"='ivan lendl';