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

Question: Who was the ran as an incumbent leader first in 1818?
SQL: SELECT "incumbent" FROM "united_states_house_of_representatives_e" WHERE "first_elected"='1818';

Question: Who were the running candidates when Joshua Sands was the incumbent?
SQL: SELECT "candidates" FROM "united_states_house_of_representatives_e" WHERE "incumbent"='Joshua Sands';