What is the sum of the years when the winner was prof. priyambada mohanty hejmadi from orissa?
CREATE TABLE "1998" (
  "year" real,
  "name" text,
  "field" text,
  "state" text,
  "country" text
);
SELECT SUM("year") FROM "1998" WHERE "state"='orissa' AND "name"='prof. priyambada mohanty hejmadi';