CREATE TABLE table_21687 ("Athlete" CLOB, "Event" CLOB, "Round of 32" CLOB, "Round of 16" CLOB, "Quarterfinals" CLOB, "Semifinals" CLOB)

Name the round 16 for did not advance and light flyweight
SELECT "Round of 16" FROM table_21687 WHERE "Quarterfinals" = 'Did not advance' AND "Event" = 'Light flyweight'
SELECT "Round of 16" FROM "table_21687" WHERE "Event" = 'Light flyweight' AND "Quarterfinals" = 'Did not advance'