CREATE TABLE table_204_103 (id DECIMAL, "medal" TEXT, "name" TEXT, "sport" TEXT, "event" TEXT)

which sport had the least silver medalists ?
SELECT "sport" FROM table_204_103 GROUP BY "sport" ORDER BY COUNT("medal") LIMIT 1
SELECT "sport" FROM "table_204_103" GROUP BY "sport" ORDER BY COUNT("medal") NULLS FIRST LIMIT 1