anchor.diff:  1985/5/3,"Aeroflot Flight 8381","","","",49.84055555555556,24.864444444444445,""
   1985/6/14,"TWA Flight 847","","","",0,0,""
   1985/6/21,"Braathens SAFE Flight 139","","","",0,0,""
  -1985/6/23,"Air India Flight 182","","","",undefined,undefined,""
  +1985/6/23,"Air India Flight 182","","","",,,""
   1985/7/10,"Aeroflot Flight 7425","","","",42.156666666666666,63.55555555555555,""
   1985/8/2,"Delta Air Lines Flight 191","","","",32.91833333333333,-97.02361111111111,""
   1985/8/12,"Japan Airlines Flight 123","","","",36.00138888888889,138.6938888888889,""
  
positive.code: 1969/1/6,"Allegheny Airlines Flight 737","","","",41.86,-78.7286111111111,""
  1969/1/13,"Scandinavian Airlines Flight 933","","","",33.92055555555555,-118.53277777777778,""
  1969/1/18,"United Airlines Flight 266","","","",33.94888888888889,-118.65833333333335,""
  1969/2/18,"Hawthorne Nevada Airlines Flight 708","","","",undefined,undefined,""
  1969/2/24,"Far Eastern Air Transport Flight 104","","","",0,0,""
  1969/3/16,"Viasa Flight 742","","","",10.566666666666666,-71.73333333333333,""
  1969/3/20,"1969 Aswan Ilyushin Il-18 crash","","","",0,0,""
  
negative.code: 1955/3/26,"Pan Am Flight 845/26","","","",43.80416666666667,-125.21111111111111,""
  1955/4/4,"United Airlines Douglas DC-6 crashes","","","",40.79527777777778,-73.10027777777778,""
  1955/4/11,"Kashmir Princess","","","",0,0,""
  1955/7/27,"El Al Flight 402","","","",,,""
  1955/10/6,"United Airlines Flight 409","","","",41.345,-106.32916666666667,""
  1955/11/1,"United Airlines Flight 629","","","",40.2,-104.95583333333333,""
  1956/2/18,"1956 Scottish Airlines Malta air disaster","","","",0,0,""
  