What year was the opponent in the final john higgins category:articles with hcards?
CREATE TABLE "ranking_event_finals_8_4_titles_4_runner" (
  "outcome" text,
  "year" real,
  "championship" text,
  "opponent_in_the_final" text,
  "score" text
);
SELECT "year" FROM "ranking_event_finals_8_4_titles_4_runner" WHERE "opponent_in_the_final"='john higgins category:articles with hcards';