CREATE TABLE "edmonton_oilers_4_detroit_red_wings_1" (
  "date" text,
  "visitor" text,
  "score" text,
  "home" text,
  "record" text
);

Question: Who is the visitor on May 9?
SQL: SELECT "visitor" FROM "edmonton_oilers_4_detroit_red_wings_1" WHERE "date"='may 9';