CREATE TABLE "table1_225204_4" (
  "district" text,
  "vacator" text,
  "reason_for_change" text,
  "successor" text,
  "date_successor_seated" text
);

Question: Name the successor for north carolina 13th
SQL: SELECT "successor" FROM "table1_225204_4" WHERE "district"='North Carolina 13th';

Question: Name the date successor seated for pennsylvania 17th
SQL: SELECT "date_successor_seated" FROM "table1_225204_4" WHERE "district"='Pennsylvania 17th';