remove implication prehistoric_species (78240) -> extinct (41)
remove implication mammoth (495) -> extinct (41)
remove implication recently_extinct_species (2647) -> extinct (41)
create implication mammoth (495) -> prehistoric_species (78240)
remove implication woolly_mammoth (74) -> recently_extinct_species (2647)
remove implication hydrodamalis (2) -> extinct (41)