CREATE TABLE "table1_225094_4" (
  "district" text,
  "vacator" text,
  "reason_for_change" text,
  "successor" text,
  "date_successor_seated" text
);

Question: Name the reason for change for jonathan jennings
SQL: SELECT COUNT("reason_for_change") FROM "table1_225094_4" WHERE "successor"='Jonathan Jennings';

Question: Name the date successor seated for failure to elect
SQL: SELECT "date_successor_seated" FROM "table1_225094_4" WHERE "reason_for_change"='failure to elect';