Which opponent has a Surface of clay, an Outcome of winner, a Tournament of bogotá, and a Score of 6–0, 6–4?
CREATE TABLE "singles_22_15_7" (
  "outcome" text,
  "date" text,
  "tournament" text,
  "surface" text,
  "opponent" text,
  "score" text
);
SELECT "opponent" FROM "singles_22_15_7" WHERE "surface"='clay' AND "outcome"='winner' AND "tournament"='bogotá' AND "score"='6–0, 6–4';