echo set to 1
graphics set to 1
verbosity set to 0
tuna has fin .

  +--C02C06--+
  |   +C03C06+C06C08+
  |   |      |      |
tuna has    fin     .

eagle isa bird .

  +---C01C05--+
  |    +C04C05+C05C08+
  |    |      |      |
eagle isa   bird     .

fin isa extremity .

 +--C06C07--+
 |   +C04C07+C07C08+
 |   |      |      |
fin isa extremity  .

tuna isa fish .



[tuna] [isa] [fish] [.]

fin has scale .

 +--C06C07--+
 |   +C03C07+C07C08+
 |   |      |      |
fin has   scale    .

eagle has wing .

  +---C01C05--+
  |    +C03C05+C05C08+
  |    |      |      |
eagle has   wing     .

wing has feather .



[wing] [has] [feather] [.]

wing isa extremity .



[wing] [isa] [extremity] [.]

herring isa fish .



[herring] [isa] [fish] [.]

herring has fin .

   +---C02C06---+
   |     +C03C06+C06C08+
   |     |      |      |
herring has    fin     .

parrot isa bird .

   +---C01C05--+
   |    +C04C05+C05C08+
   |    |      |      |
parrot isa   bird     .

parrot has wing .

   +---C01C05--+
   |    +C03C05+C05C08+
   |    |      |      |
parrot has   wing     .

Bye.