What artist shows 2007 and composer of Hayko?
CREATE TABLE "eurovision_song_contest_entries" (
  "year" real,
  "song" text,
  "artist" text,
  "place" text,
  "points" text,
  "composer" text
);
SELECT "artist" FROM "eurovision_song_contest_entries" WHERE "year"=2007 AND "composer"='hayko';