Question: What district is Samuel A. Bridges ( D ) assigned to as a successor?
SQL: SELECT "District" FROM "1-228439-4" WHERE "Successor" = 'Samuel A. Bridges ( D )';

Question: what was the reason Richard K. Meade ( D ) became a successor?
SQL: SELECT "Reason for change" FROM "1-228439-4" WHERE "Successor" = 'Richard K. Meade ( D )';

Question: Who is the successor for Massachusetts 8th?
SQL: SELECT "Successor" FROM "1-228439-4" WHERE "District" = 'Massachusetts 8th';