What season has Group IV Sevilla, Group VI las palmas, group III barcelona, and group 1 sporting?
CREATE TABLE "champions" (
  "season" text,
  "group_i" text,
  "group_ii" text,
  "group_iii" text,
  "group_iv" text,
  "group_v" text,
  "group_vi" text
);
SELECT "season" FROM "champions" WHERE "group_iv"='sevilla' AND "group_vi"='las palmas' AND "group_iii"='barcelona' AND "group_i"='sporting';