When were the years on which warwick had a population greater than 10,956 and allora had a population bigger than 2,439?
CREATE TABLE "population" (
  "year" real,
  "population_region_total" real,
  "population_stanthorpe" real,
  "population_warwick" real,
  "population_allora" real,
  "population_glengallan" real,
  "population_rosenthal" real
);
SELECT SUM("year") FROM "population" WHERE "population_warwick"='10,956' AND "population_allora">'2,439';