anchor.diff:  GASS28143,3,O,"C,S",Diffuse spiral arms
   GASS112038,2,B,"C,D",Offset bulge
   GASS30471,2,B,"C,S",Large galaxy
  -GASS112051,1,G,"C,B",Bright nearby source
  +GASS112051,1,G,"C,B",Bright nearby object
   GASS112109,2,B,"C,S,I",Large galaxy
   GASS24366,2,B,"C,S",Embedded source
   GASS24436,2,B,"C,S",Embedded source
   GASS24437,1,O,"C,D",Edge on
  -GASS12983,2,B,"C,B",Bright nearby source
  +GASS12983,2,B,"C,B",Bright nearby object
   GASS28168,1,O,"C,S",Diffuse spiral arms
   GASS112053,2,B,"C,S,I","Large galaxy, Diffuse spiral arms, Embedded object"
   GASS50550,2,B,C,
  
positive.code: GASS112078,2,B,"C,S",Clumpy
  GASS18421,3,O,C,
  GASS18279,1,O,"C,S",
  GASS24094,2,B,"C,S,B",Bright nearby source
  GASS24757,2,B,C,Diffuse spiral arms
  GASS18422,2,O,C,
  GASS30338,2,B,"C,D",Edge on
  
negative.code: GASS48604,3,B,C,
  GASS17865,2,B,"C,S",Embedded object
  GASS111067,1,O,-,Clumpy
  GASS29892,2,B,"C,B",Bright nearby object
  GASS111030,3,B,"C,S",
  GASS29871,2,B,C,
  GASS48974,1,O,"C,D","Interacting, Tidal"
  