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

Question: what's the result for first elected in 1948 , 1964
SQL: SELECT "result" FROM "illinois" WHERE "first_elected"='1948 , 1964';

Question: what's the first elected with district illinois 18
SQL: SELECT "first_elected" FROM "illinois" WHERE "district"='Illinois 18';

Question: what's the party with candidates  jerry weller (r) 51.77% clem balanoff (d) 48.23%
SQL: SELECT "party" FROM "illinois" WHERE "candidates"='Jerry Weller (R) 51.77% Clem Balanoff (D) 48.23%';

Question: what's the party for the first elected in 1980
SQL: SELECT "party" FROM "illinois" WHERE "first_elected"='1980';

Question: what's the result with district illinois 15
SQL: SELECT "result" FROM "illinois" WHERE "district"='Illinois 15';

Question: what's the total number of candidates for first elected in 1948 , 1964
SQL: SELECT COUNT("candidates") FROM "illinois" WHERE "first_elected"='1948 , 1964';