anchor.diff:  GASS48994,2,B,C,Large galaxy
   GASS111047,1,G,-,Clumpy
   GASS12597,2,O,"C,D",Edge on
  -GASS111036,1,G,C,Group
  +GASS111036,1,O,C,Group
   GASS111024,2,B,"C,S,B",Bright nearby object
   GASS111090,?,O,"C,S,D",Interacting
   GASS111002,2,B,"C,S,D",Edge on
  
positive.code: GASS28482,2,B,"C,S",
  GASS6506,2,B,C,
  GASS13037,1,G,"C,S",Group
  GASS112081,1,O,"C,S,B,D,I","Large galaxy, Bright nearby object, Edge on"
  GASS112054,1,G,"C,B",Bright nearby object
  GASS28462,3,G,"C,B",Bright nearby object
  GASS28461,1,G,"C,S,B,I",Large galaxy
  
negative.code: GASS20286,2,O,"C,S,D",Embedded object
  GASS109080,1,O,"C,S",Diffuse spiral arms
  GASS109094,2,O,"C,S",Embedded object
  GASS109079,2,B,"C,D",Truncated disk
  GASS109034,1,G,S,
  GASS109135,3,O,"S,D",
  GASS109050,2,O,"C,S,D",Embedded object
  