CREATE TABLE table_56718 ("Athlete" CLOB, "Event" CLOB, "Round of 16" CLOB, "Quarterfinal" CLOB, "Semifinal" CLOB, "Final" CLOB)

Hossein Ojaghi participated in what semifinal.
SELECT "Semifinal" FROM table_56718 WHERE "Athlete" = 'hossein ojaghi'
SELECT "Semifinal" FROM "table_56718" WHERE "Athlete" = 'hossein ojaghi'