Table: successor_vacancies
Columns: district
vacator
reason_for_change
successor
date_successor_seated

Question: Name the successor for north carolina 13th
SQL: SELECT "successor" FROM successor_vacancies WHERE "district" = 'North Carolina 13th'

Question: Name the date successor seated for pennsylvania 17th
SQL: SELECT "date_successor_seated" FROM successor_vacancies WHERE "district" = 'Pennsylvania 17th'