What is the region 1 (Canada) date associated with a region 2 (UK) date of May 18, 2009?
CREATE TABLE "table1_240936_2" (
  "dvd_name" text,
  "ep_num" text,
  "region_1_us" text,
  "region_1_can" text,
  "region_2_uk" text,
  "region_2_germany" text,
  "region_4_australia" text
);
SELECT "region_1_can" FROM "table1_240936_2" WHERE "region_2_uk"='May 18, 2009';