What dates and firm does Larry O'Brien have 18% when Terry Kilrea dropped out?
CREATE TABLE "poll_results" (
  "polling_firm" text,
  "polling_dates" text,
  "bob_chiarelli" text,
  "alex_munter" text,
  "larry_o_brien" text,
  "terry_kilrea_dropped_out" text
);
SELECT "terry_kilrea_dropped_out" FROM "poll_results" WHERE "larry_o_brien"='18%';