remove implication prehistoric_species (71623) -> extinct (11)
remove implication mammoth (456) -> extinct (11)
remove implication recently_extinct_species (2362) -> extinct (11)
create implication mammoth (456) -> prehistoric_species (71623)
remove implication woolly_mammoth (69) -> recently_extinct_species (2362)
remove implication hydrodamalis (1) -> extinct (11)