#let _par(name, display-name: auto, start-at: 0) = {
  return ((
    type: "par",
    name: name,
    display-name: if display-name == auto {name} else {display-name},
    start-at: start-at
  ),)
}

#let _exists(participants, name) = {
  for p in participants {
    if name == p.name {
      return true
    }
  }
  return false
}