anchor.diff:  Shankar Balasubramanian,
   Sharam Kohan,
   Sharon Weiss,363
  -Shaun Wylie,
  +Shaun Wylie,11
   Sheela Basrur,21
   Sheila Patricia Violet Sherlock,
   Shekhar C. Mande,70
  
positive.code: Sanford Alexander Moss,10
  Sanjaya Lall,
  Sanjeev Arora,
  Sanjoy K. Mitter,
  Sankar K Pal,498
  Santiago Ramón y Cajal,
  Santosh Vempala,233
  
negative.code: Federigo Enriques,
  Felix Berezin,
  Felix Bloch,89
  Felix Ehrenhaft,39
  Felix Hausdorff,
  Felix Jacoby,
  Felix Otto,
  