CREATE TABLE "ohio" (
  "district" text,
  "incumbent" text,
  "party" text,
  "first_elected" real,
  "results" text,
  "candidates" text
);

Question: When was the incumbent Sherrod Brown first elected? 
SQL: SELECT MAX("first_elected") FROM "ohio" WHERE "incumbent"='Sherrod Brown';

Question: What was the result of the election in which the incumbent was first elected in 1984?
SQL: SELECT "results" FROM "ohio" WHERE "first_elected"=1984;

Question: Which incumbent was first elected in 1972? 
SQL: SELECT "incumbent" FROM "ohio" WHERE "first_elected"=1972;

Question: Tony P. Hall was the incumbent in the race between what two candidates? 
SQL: SELECT "candidates" FROM "ohio" WHERE "incumbent"='Tony P. Hall';

Question: In which district is the incumbent Marcia C. Kaptur? 
SQL: SELECT "district" FROM "ohio" WHERE "incumbent"='Marcia C. Kaptur';