Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_29576 ( "Name/Name of Act" text, "Age(s)" text, "Genre" text, "Act" text, "Hometown" text, "Qtr. Final (Week)" real, "Semi Final (Week)" text, "Position Reached" text )

### Question ###
How many semi-final weeks are there for acts from Pittsburgh, Pennsylvania?

### Accurate SQL ###

SELECT COUNT("Semi Final (Week)") FROM table_29576 WHERE "Hometown" = 'Pittsburgh, Pennsylvania'