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_73407 ( "District" text, "Vacator" text, "Reason for change" text, "Successor" text, "Date successor seated" text )

### Question ###
Name the reason for change pennsylvania 13th

### Accurate SQL ###

SELECT "Reason for change" FROM table_73407 WHERE "District" = 'Pennsylvania 13th'