CREATE TABLE "table1_2668347_17" (
  "district" text,
  "incumbent" text,
  "party" text,
  "first_elected" real,
  "result" text,
  "candidates" text
);

Question: Name the candidates for pennsylvania 14
SQL: SELECT "candidates" FROM "table1_2668347_17" WHERE "district"='Pennsylvania 14';

Question: Name the incumbent for jacob spangler (dr) 67.1% jacob hay (f) 32.9%
SQL: SELECT "incumbent" FROM "table1_2668347_17" WHERE "candidates"='Jacob Spangler (DR) 67.1% Jacob Hay (F) 32.9%';

Question: Name the most first elected
SQL: SELECT MAX("first_elected") FROM "table1_2668347_17";

Question: Name the number of candidates for  samuel d. ingham
SQL: SELECT COUNT("candidates") FROM "table1_2668347_17" WHERE "incumbent"='Samuel D. Ingham';