remove implication prehistoric_species (69590) -> extinct (10)
remove implication mammoth (450) -> extinct (10)
remove implication recently_extinct_species (2287) -> extinct (10)
create implication mammoth (450) -> prehistoric_species (69590)
remove implication woolly_mammoth (68) -> recently_extinct_species (2287)
remove implication hydrodamalis (1) -> extinct (10)