CREATE TABLE "table1_2668393_18" (
  "district" text,
  "incumbent" text,
  "party" text,
  "first_elected" text,
  "result" text,
  "candidates" text
);

Question: How many times was the incumbent john dawson redistricted from the 15th district?
SQL: SELECT COUNT("candidates") FROM "table1_2668393_18" WHERE "incumbent"='John Dawson Redistricted from the 15th district';

Question: What is the party for the candidates edwin gray (dr)?
SQL: SELECT "party" FROM "table1_2668393_18" WHERE "candidates"='Edwin Gray (DR)';

Question: What is the result in the virginia 11 district?
SQL: SELECT "result" FROM "table1_2668393_18" WHERE "district"='Virginia 11';

Question: What is the district with the candidates edwin gray (dr)?
SQL: SELECT "district" FROM "table1_2668393_18" WHERE "candidates"='Edwin Gray (DR)';

Question: How many incumbents were first elected in 1797 with the candidates abram trigg (dr)?
SQL: SELECT COUNT("incumbent") FROM "table1_2668393_18" WHERE "first_elected"='1797' AND "candidates"='Abram Trigg (DR)';