CREATE TABLE table_51434 ("Athlete" CLOB, "Event" CLOB, "Round of 32" CLOB, "Round of 16" CLOB, "Quarterfinal" CLOB, "Semifinal" CLOB, "Final" CLOB)

When the round of 32 was n/a and quarterfinal was did not advance, what was the round of 16?
SELECT "Round of 16" FROM table_51434 WHERE "Quarterfinal" = 'did not advance' AND "Round of 32" = 'n/a'
SELECT "Round of 16" FROM "table_51434" WHERE "Quarterfinal" = 'did not advance' AND "Round of 32" = 'n/a'