// This defines a taxonomy of various natural concepts

abstract_thing, concrete_thing, unpleasant_thing, pleasant_thing, clever_thing <| thing.

thought, figure_of_speech, science, poetry, song, feeling <| abstract_thing.

idea, dream <| thought.

good_idea, bad_idea <| idea.

pleasant_dream, nightmare <| dream.

good_feeling, bad_feeling <| feeling.

bad_feeling, bad_idea, illness, nightmare, stress, sadness, scavenger, war <| unpleasant_thing.

war, evil_invention <| bad_idea.

peace, beneficial_invention <| good_idea.

good_feeling, good_idea,  pleasant_dream, gift, award, house_pet, poetry, song, garden_plant, tree, sport <| pleasant_thing.

award, gift <| concrete_thing.

friendship, love <| good_feeling.

hatred, jealousy <| bad_feeling.

individual_sport, team_sport, competing_sport <| sport.

soccer, basket_ball <| team_sport.

tennis, boxing, golf <| competing_sport.

marathon, golf <| individual_sport.

lullaby, blues, rock_and_roll <| song.

beneficial_invention, evil_invention <| invention.

beneficial_invention <| good_thing.

evil_invention <| bad_thing.

house, musical_instrument, bicyle, car, computer <| beneficial_invention.

beneficial_invention <| pleasant_thing.

evil_invention <| unpleasant_thing.

chemical_weapon, atomic_bomb <| evil_invention.

natural_system, artificial_system <| system.

biological_system, vegetal_system <| natural_system.

forest, vegetal <| vegetal_system.

living_thing, rock_formation, desert, jungle, weather_system <| natural_system.

rain, snow, fog, storm, hurricane, blizzard, wind <| weather_system.

storm,  hurricane, blizzard  <| unpleasant_thing.

mesa, moutain, ridge <| rock_formation.

piano, guitar, violin, cello <| musical_instrument.

man_made_artefact, bird_nest, ant_hill <| artefact, clever_thing.

artefact <| artificial_system.

abstract_man_made_artefact <| abstract_thing.

abstract_man_made_artefact, concrete_man_made_artefact <| man_made_artefact.

house, car, bicyle, computer, musical_instrument <| concrete_man_made_artefact, pleasant_thing.

concrete_man_made_artefact <| concrete_invention.

poetry, science <| abstract_man_made_artefact.

prose, verse <| poetry.

computer_science, mathematics, biology, medicine <| science.

house, car, computer <| inanimate_thing.

litote,  metaphor, poetry <| figure_of_speech.

living_thing, inanimate_thing <| concrete_thing.

living_thing <| biological_system.

vegetal, animal <| living_thing.

rock, artefact <| inanimate_thing.

house_pet, mammal, fish, bird, insect, reptile, amphibian, mollusk <| animal.

insect <| wild_animal.

tree, fern, cactus, garden_plant, poison_ivy <| vegetal.

poison_ivy <| unpleasant_thing.

rose, lily, rhododendron, cactus <| garden_plant.

fruit_tree, forest_tree, palm_tree <| tree.

cedar, pine, oak, maple, elm <| forest_tree.

apple_tree, pear_tree, palm_tree <| fruit_tree.

cat, dog, canari, gold_fish <| house_pet.

flying_bird <| flying_creature.

asp, cobra, boa, python <| reptile, wild_animal.

reptile <| unpleasant_thing.

primate, cetacean, bovine, feline, lupine, ursine, rodent, chiroptera <| mammal.

chiroptera <| wild_animal, insectivore.

bat <| chiroptera.

bear, grizzly, panda, koala <| ursine, wild_animal.

panda, koala <| herbivore, pleasant_thing.

cetacean <| sea_creature, pleasant_thing.

dolphin, whale <| cetacean.

jelly_fish <| sea_mollusk.

shark, jelly_fish <| sea_creature, unpleasant_thing.

cetacean <| wild_animal.

human, wild_primate <| primate.

ape, monkey <| wild_primate.

wild_primate, wild_feline, musteline <| wild_animal.

lion, tiger <| wild_feline.

cat, wild_feline <| feline.

dog, wolf, coyote, hyena <| lupine.

skunk, weasel, otter, badger, stoat, wolverine <| musteline.

otter <| pleasant_thing.

skunk <| unpleasant_thing.

wolf, coyote, hyena <| wild_animal.

primate <| biped, carnivore, herbivore.

feline, lupine, human, fish, snake, bear, grizzly <| carnivore.

human, fish, grizzly <| fish_eater.

fish_eater <| carnivore.

bovine, equine, ovine <| quadruped, herbivore.

ox, cow <| bovine, farm_animal.

buffalo, yak <| bovine, wild_animal.

horse, zebra, donkey <| equine, quadruped.

horse, donkey <| farm_animal.

farm_animal <| animal, pleasant_thing.

zebra <| wild_animal.

sheep, goat <| ovine, farm_animal.

feline, lupine, musteline <| quadruped.

musteline <| carnivore.

fish, seaweed, cephalopod, sea_mollusk <| aquatic_creature.

octopus, squid <| cephalopod.

sea_mollusk, land_mollusk <| mollusk.

snail, slug <| land_mollusk.

snail <| shelled_creature, pleasant_thing.

slug <| unpleasant_thing.

oyster, clam, mussel <| sea_mollusk, shelled_creature.

sea_mollusk <| sea_creature.

sea_creature, lake_creature, river_creature <| aquatic_creature.

crawling_creature, biped, quadruped, amphibian, insect, land_mollusk <| land_creature.

arachnid <| crawling_creature.

spider, scorpion <| arachnid, unpleasant_thing.

amphibian, mosquito, fly <| pond_creature.

frog, toad, salamander <| amphibian, insectivore.

frog, toad <| hopping_creature, aquatic_creature.

kangaroo <| mammal, hopping_creature.

hopping_creature <| land_creature.

boa, trout <| river_creature.

trout, loch_ness_monster <| lake_creature.

ogre, vampire, ghost, loch_ness_monster <| imaginary_creature.

ogre, vampire, ghost <| unpleasant_thing.

eagle, falcon, lion, tiger, piranha, wolf, shark, boa <| predator.

predator, scavenger <| carnivore.

trout, shark, tuna <| fish.

reptile, land_mollusk <| crawling_creature.

penguin <| biped, aquatic_creature, flightless_bird.

chicken <| flightless_bird, farm_animal, granivore.

land_creature, flying_creature, aquatic_creature, pond_creature, hopping_creature, shelled_creature <| creature.

flying_insect <| flying_creature.

flying_insect, crawling_insect, colony_insect, swarming_insect, stinging_insect <| insect.

crawling_insect <| crawling_creature.

mosquito, bee, cicada, locust <| swarming_insect.

fly, mosquito, bee, wasp, cicada, locust, ladybug, dragonfly <| flying_insect.

fly, mosquito, wasp, locust <| unpleasant_thing.

bee, cicada, ladybug, dragonfly <| pleasant_thing.

ant, cockroach <| crawling_insect, unpleasant_thing.

ladybug <| crawling_insect.

ant, bee <| colony_insect.

bee, wasp <| pollenivore.

ant <| scavenger.

ant, bee, wasp, mosquito <| stinging_insect.

wild_animal <| animal.

imaginary_creature <| creature.

granivore, insect, fish_eater, insectivore, pollenivore, carnivore, herbivore <| creature.

flying_bird, swimming_bird, flightless_bird <| bird.

cormoran, penguin <| swimming_bird, fish_eater, wild_animal.

eagle, falcon, vulture, crow, piranha <| wild_animal.

rat, beaver <| rodent.

rat <| land_creature, unpleasant_thing.

rodent <| land_creature.

hyena, coyote, vulture, crow, piranha, rat, cockroach <| scavenger.

cockroach <| insect.

bald_eagle, erne <| eagle, fish_eater.

ostrich, emu <| flightless_bird, herbivore.

pidgeon, finch, sparrow, canari, crow, eagle, falcon, vulture, cormoran <| flying_bird.

pidgeon, finch, sparrow, canari <| granivore, insectivore.

sexual_illness, viral_illness, microbial_illness <| illness.

herpes, flu <| viral_ilness.

rabies <| microbial_illness.

herpes, impotence  <| sexual_illness.

cancer, ulcer <| illness.