Context: CREATE TABLE table_14903999_1 (mens_singles VARCHAR, mens_doubles VARCHAR, womens_singles VARCHAR)
Question: Who won mens singles the year sveinn logi sölvason tryggvi nilsen won mens doubles and elsa nielsen won womens singles
Answer: SELECT mens_singles FROM table_14903999_1 WHERE mens_doubles = "Sveinn Logi Sölvason Tryggvi Nilsen" AND womens_singles = "Elsa Nielsen"