Table: us_congress_succession
Columns: district
vacator
reason_for_change
successor
date_successor_seated

Question: How many vacators were in the Pennsylvania 33rd district?
SQL: SELECT COUNT("vacator") FROM us_congress_succession WHERE "district" = 'Pennsylvania 33rd'

Question: Who was the successor for the Kentucky 2nd district?
SQL: SELECT "successor" FROM us_congress_succession WHERE "district" = 'Kentucky 2nd'