Who won mens singles the year sveinn logi sölvason tryggvi nilsen won mens doubles and elsa nielsen won womens singles
CREATE TABLE "table1_14903999_1" (
  "year" real,
  "mens_singles" text,
  "womens_singles" text,
  "mens_doubles" text,
  "womens_doubles" text,
  "mixed_doubles" text
);
SELECT "mens_singles" FROM "table1_14903999_1" WHERE "mens_doubles"='Sveinn Logi Sölvason Tryggvi Nilsen' AND "womens_singles"='Elsa Nielsen';