#visitor__visitant  someone who visits
  supertype:  traveler__traveller  a person who changes location
  subtype:  caller__company  a social or business visitor; "the room was a mess because he hadn't expected company"
  subtype:  invitee__guest  a visitor to whom hospitality is extended
     subtype:  house_guest__houseguest  a guest entertained in your house
     subtype:  wedding_guest__weddingguest  a guest at a wedding
  subtype:  visiting_fireman  an important or distinguished visitor

No statement uses or specializes visitor; click here to add one.