original_query: What dinosaurs inhabited the Black Hills in South Dakota?
query: What dinosaurs inhabited the Black Hills in South Dakota during the Cretaceous period?
answer: During the Late Cretaceous, the Black Hills region may have attracted plesiosaurs, and land dinosaurs included Edmontonia, Edmontosaurus, Ornithomimus, Pachycephalosaurus, Triceratops, and Tyrannosaurus.