What was the title of the song that peaked the charts at #1 with track 20?
CREATE TABLE "disc_four" (
  "track" real,
  "recorded" text,
  "catalogue" text,
  "release_date" text,
  "chart_peak" text,
  "song_title" text,
  "time" text
);
SELECT "song_title" FROM "disc_four" WHERE "chart_peak"='#1' AND "track"=20;