Against Opponent in the Final Ivan Lendl, on a Surface of clay, with an Outcome of runner-up, where was the Championship?
CREATE TABLE "singles_titles_16" (
  "outcome" text,
  "date" real,
  "championship" text,
  "surface" text,
  "opponent_in_the_final" text,
  "score_in_the_final" text
);
SELECT "championship" FROM "singles_titles_16" WHERE "outcome"='runner-up' AND "surface"='clay' AND "opponent_in_the_final"='ivan lendl';