anchor.diff:  Donald G. Truhlar,
   Donald Geman,
   Donald H. Owings,77
  -Donald Henry Colless,
  +Donald Henry Colless,0
   Donald Hopkins,
   Donald Howard Menzel,64
   Donald J. Cram,466
  
positive.code: Irving Langmuir,354
  Irving Rouse,
  Irving Segal,
  Irving Stoy Reed,
  Irving Widmer Bailey,88
  Irwin I. Shapiro,
  Irwin McLean,
  
negative.code: Mathias Dewatripont,329
  Mathias Fink,718
  Mathukumalli Venkata Subbarao,0
  Matija Gogala,118
  Matilda Knowles,
  Matthew Hay,
  Matthew Kaufman,
  