CREATE TABLE table_203_102 (id DECIMAL, "event" TEXT, "performance" TEXT, "athlete" TEXT, "nation" TEXT, "place" TEXT, "date" TEXT)

which person set at least 2 world records ?
SELECT "athlete" FROM table_203_102 GROUP BY "athlete" HAVING COUNT(*) >= 2
SELECT "athlete" FROM "table_203_102" GROUP BY "athlete" HAVING COUNT(*) >= 2