What was Kilgore's percentage when Potts (I) had 4% and Kaine (D) 47%, in the poll from October 30, 2005?
CREATE TABLE "opinion_polls" (
  "source" text,
  "date" text,
  "kaine_d" text,
  "kilgore_r" text,
  "potts_i" text
);
SELECT "kilgore_r" FROM "opinion_polls" WHERE "potts_i"='4%' AND "kaine_d"='47%' AND "date"='october 30, 2005';