Name the Score which has a Time of 18:00 and a Venue of african union?
CREATE TABLE "group_1" (
  "match_no" real,
  "date" text,
  "time" text,
  "score" text,
  "venue" text,
  "match_report" text
);
SELECT "score" FROM "group_1" WHERE "time"='18:00' AND "venue"='african union';