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_28564 ( "Finished" text, "Performance Order" real, "Percentage of votes" text, "Artist" text, "Act" text, "Semi Finals Result" text )

### Question ###
Name the number of semi final results for 12 performance order

### Accurate SQL ###

SELECT COUNT("Semi Finals Result") FROM table_28564 WHERE "Performance Order" = '12'