CREATE TABLE table_30364 ("Name/Name of Act" CLOB, "Age ( s ) " CLOB, "Genre" CLOB, "Act" CLOB, "Hometown" CLOB, "Semifinal  ( Week ) " FLOAT, "Position Reached" CLOB)

How many performers are 29 that made it to the semi finals?
SELECT "Semifinal (Week)" FROM table_30364 WHERE "Age(s)" = '29'
SELECT "Semifinal (Week)" FROM "table_30364" WHERE "Age(s)" = '29'