Permian-Triassic extinction event
{'<entity_0>': 'Permian-Triassic extinction event', '<entity_1>': 'Paleozoic', '<entity_2>': 'Mesozoic'}
[['Permian-Triassic extinction event', 'followed by', 'Mesozoic'], ['Permian-Triassic extinction event', 'follows', 'Paleozoic']]
The <entity_0>, also known as the P–Tr extinction, the P–T extinction, the End-Permian Extinction, and colloquially as the Great Dying, formed the boundary between the Permian and Triassic geologic periods, as well as between the <entity_1> and <entity_2> eras, approximately 251.9 million years ago.
['extinction event']