anchor.diff:  Olivia Nobs,27,Switzerland,2010,2/28/10,Snowboarding,0,0,1,1
   Peetu Piiroinen,22,Finland,2010,2/28/10,Snowboarding,0,1,0,1
   Tony Ramoin,21,France,2010,2/28/10,Snowboarding,0,0,1,1
  -Malle Ricker,31,Canada,2010,2/28/10,Snowboarding,1,0,0,1
  +Ma_lle Ricker,31,Canada,2010,2/28/10,Snowboarding,1,0,0,1
   Mike Robertson,24,Canada,2010,2/28/10,Snowboarding,0,1,0,1
   Nicolien Sauerbreij,30,Netherlands,2010,2/28/10,Snowboarding,1,0,0,1
   Hannah Teter,23,United States,2010,2/28/10,Snowboarding,0,1,0,1
  
positive.code: Du Li,22,China,2004,8/29/04,Shooting,1,0,0,1
  Matt Emmons,23,United States,2004,8/29/04,Shooting,1,0,0,1
  Gao E,41,China,2004,8/29/04,Shooting,0,0,1,1
  Jozef Gnci,30,Slovakia,2004,8/29/04,Shooting,0,0,1,1
  Lenka Hykov-Marukov,19,Czech Republic,2004,8/29/04,Shooting,0,1,0,1
  Dina Igaly,39,Hungary,2004,8/29/04,Shooting,1,0,0,1
  Vladimir Isakov,34,Russia,2004,8/29/04,Shooting,0,0,1,1
  Jia Zhanbo,30,China,2004,8/29/04,Shooting,1,0,0,1
  Jin Jong-O,24,South Korea,2004,8/29/04,Shooting,0,1,0,1
  Marko Kemppainen,28,Finland,2004,8/29/04,Shooting,0,1,0,1
  Kim Jong-Su,27,North Korea,2004,8/29/04,Shooting,0,0,1,1
  Olena Kostevych,19,Ukraine,2004,8/29/04,Shooting,1,0,0,1
  Katerina Kurkov-Emmons,20,Czech Republic,2004,8/29/04,Shooting,0,0,1,1
  Manfred Kurzer,34,Germany,2004,8/29/04,Shooting,1,0,0,1
  Li Jie,31,China,2004,8/29/04,Shooting,0,1,0,1
  Christian Lusch,23,Germany,2004,8/29/04,Shooting,0,1,0,1
  
negative.code: Martin Sinkovic,22,Croatia,2012,8/12/12,Rowing,0,1,0,1
  Valent Sinkovic,23,Croatia,2012,8/12/12,Rowing,0,1,0,1
  John Smith,22,South Africa,2012,8/12/12,Rowing,1,0,0,1
  Luka _pik,33,Slovenia,2012,8/12/12,Rowing,0,0,1,1
  Heather Stanning,27,Great Britain,2012,8/12/12,Rowing,1,0,0,1
  Joseph Sullivan,25,New Zealand,2012,8/12/12,Rowing,1,0,0,1
  Ondrej Synek,29,Czech Republic,2012,8/12/12,Rowing,0,1,0,1
  