:- dynamic example/3.

example(a1,mammal,[has_covering = hair,
milk = t,
homeothermic = t,
habitat = land,
eggs = f,
gills = f]).
example(a2,mammal,[has_covering = none,
milk = t,
homeothermic = t,
habitat = sea,
eggs = f,
gills = f]).
example(a3,mammal,[has_covering = hair,
milk = t,
homeothermic = t,
habitat = sea,
eggs = t,
gills = f]).
example(a4,mammal,[has_covering = hair,
milk = t,
homeothermic = t,
habitat = air,
eggs = f,
gills = f]).
example(a5,fish,[has_covering = scales,
milk = f,
homeothermic = f,
habitat = sea,
eggs = t,
gills = t]).
example(a6,reptile,[has_covering = scales,
milk = f,
homeothermic = f,
habitat = land,
eggs = t,
gills = f]).
example(a7,reptile,[has_covering = scales,
milk = f,
homeothermic = f,
habitat = sea,
eggs = t,
gills = f]).
example(a8,bird,[has_covering = feathers,
milk = f,
homeothermic = t,
habitat = air,
eggs = t,
gills = f]).
example(a9,bird,[has_covering = feathers,
milk = f,
homeothermic = t,
habitat = land,
eggs = t,
gills = f]).
example(a10,amphibian,[has_covering = none,
milk = f,
homeothermic = f,
habitat = land,
eggs = t,
gills = f]).