Assertion: modern shark | /r/AtLocation | the early jurassic epoch
Facets:
value: by the cretaceous period
type: TEMPORAL
Source sentences:
text: Modern sharks appeared in the Early Jurassic Epoch (201.3 million to 174.1 million years ago) and by the Cretaceous Period (145 million to 66 million years ago) had expanded into the present-day families.