CREATE TABLE table_29576 ("Name/Name of Act" TEXT, "Age ( s ) " TEXT, "Genre" TEXT, "Act" TEXT, "Hometown" TEXT, "Qtr. Final  ( Week ) " FLOAT, "Semi Final  ( Week ) " TEXT, "Position Reached" TEXT)

How many semi-final weeks are there for acts from Pittsburgh, Pennsylvania?
SELECT COUNT("Semi Final (Week)") FROM table_29576 WHERE "Hometown" = 'Pittsburgh, Pennsylvania'
SELECT COUNT("Semi Final (Week)") FROM "table_29576" WHERE "Hometown" = 'Pittsburgh, Pennsylvania'