what's the current country of location with operational period  of summer of 1941 to 28 june 1944
CREATE TABLE "table1_10335_1" (
  "camp" text,
  "estimated_deaths" text,
  "operational" text,
  "occupied_territory" text,
  "current_country_of_location" text,
  "primary_means_for_mass_killings" text
);
SELECT "current_country_of_location" FROM "table1_10335_1" WHERE "operational"='Summer of 1941 to 28 June 1944';