def map_person!( line, known_persons=nil )
    if known_persons.nil?
      puts "depreciated API call map_person! (pass in mapping table as 2nd param)"
      known_persons = @known_persons
    end
    
    TextUtils.map_titles_for!( 'person', line, known_persons )
  end
def map_person!( line, known_persons=nil )
    if known_persons.nil?
      puts "depreciated API call map_person! (pass in mapping table as 2nd param)"
      known_persons = @known_persons
    end
    
    TextUtils.map_titles_for!( 'person', line, known_persons )
  end
todo/fix:
    remove =nil in para - make param required w/o fallback