Northern Line becomes a “Giggle Shelter”

{
  "input": {
    "prompt": " Illustration (news-cartoon style) inside a London Underground Northern Line station: passengers sprawled on the platform floor laughing uncontrollably, a TfL staff member in hi-vis labelled “Chuckle Warden” offering smelling salts; a sign on a pillar reads “GIGGLE SHELTER.” Include a second staffer holding up a printed “Bank Holiday timetable” like a serious emergency tool. Roundel and tiled walls establish location; keep it busy but readable.  "
  }
}