Who was the election winner with a BJP incumbent in Chhattisgarh?
CREATE TABLE "chhattisgarh_result" (
  "state" text,
  "seats_a_cs" real,
  "date_of_counting" text,
  "incumbent" text,
  "election_winner" text
);
SELECT "election_winner" FROM "chhattisgarh_result" WHERE "incumbent"='bjp' AND "state"='chhattisgarh';