Performer 1 of greg proops, and a Date of 25 august 1995 is what performer 4?
CREATE TABLE "series_7" (
  "date" text,
  "episode" real,
  "performer_1" text,
  "performer_2" text,
  "performer_3" text,
  "performer_4" text
);
SELECT "performer_4" FROM "series_7" WHERE "performer_1"='greg proops' AND "date"='25 august 1995';