งานเดียวที่เธอเข้าร่วมในห้องนิรภัยคืออะไร?ไม่จำเป็นต้องใช้โต๊ะทั้งหมด
what was the only event that she participated in the vault ?It is not neccessary to use all the tables.
 table_204_975:  id [ number]  "year" [ number]  "competition" [ text]  "location" [ text]  "event" [ text]  "final-rank" [ text]  "final-score" [ number] 
SELECT "competition" FROM table_204_975 WHERE "event" = 'vault'