Who were the opponents on grass when playing with Mark Woodforde, and the outcome of winner, and a year greater than 1996?
CREATE TABLE "grand_slam_men_s_doubles_finals_20_16_4" (
  "outcome" text,
  "year" real,
  "championship" text,
  "surface" text,
  "partner" text,
  "opponents" text,
  "score" text
);
SELECT "opponents" FROM "grand_slam_men_s_doubles_finals_20_16_4" WHERE "surface"='grass' AND "partner"='mark woodforde' AND "outcome"='winner' AND "year">1996;