Text: A curious and fascinating attraction is the La Brea Tar Pits, one of the world's richest sources of Pleistocene fossils that date back 40,000 years.
Entailment: The La Brea Tar Pits have been a known location for digging up fossils from up to 40k years ago.
Contradiction: The La Brea Tar Pits are only about two thousand years old.