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

Question: How many parties does incumbent carl vinson represent?
SQL: SELECT COUNT("party") FROM "united_states_house_of_representatives_e" WHERE "incumbent"='Carl Vinson';

Question: How many parties does incumbent stephen pace represent?
SQL: SELECT COUNT("party") FROM "united_states_house_of_representatives_e" WHERE "incumbent"='Stephen Pace';