CREATE TABLE table_14903999_1 (mens_singles VARCHAR2, mens_doubles VARCHAR2, womens_singles VARCHAR2)

Who won mens singles the year sveinn logi s lvason tryggvi nilsen won mens doubles and elsa nielsen won womens singles
SELECT mens_singles FROM table_14903999_1 WHERE mens_doubles = "Sveinn Logi Sölvason Tryggvi Nilsen" AND womens_singles = "Elsa Nielsen"
SELECT "mens_singles" FROM "table_14903999_1" WHERE "Elsa Nielsen" = "womens_singles" AND "Sveinn Logi Sölvason Tryggvi Nilsen" = "mens_doubles"