remove implication prehistoric_species (63894) -> extinct (8)
remove implication mammoth (393) -> extinct (8)
remove implication recently_extinct_species (2076) -> extinct (8)
create implication mammoth (393) -> prehistoric_species (63894)
remove implication woolly_mammoth (39) -> recently_extinct_species (2076)
remove implication hydrodamalis (1) -> extinct (8)