When zachary sanders is the performer what is the lowerst first aired?
CREATE TABLE "table1_191105_3" (
  "episode_title" text,
  "subject" text,
  "music_by" text,
  "performed_by" text,
  "first_aired" real
);
SELECT MIN("first_aired") FROM "table1_191105_3" WHERE "performed_by"='Zachary Sanders';