Assertion: bat's virus | /r/Causes | major diseases
Facets:
value: in the past
type: TEMPORAL
Source sentences:
text: Many viruses, bacteria and parasites that have caused major diseases in the past have been zoonotic, meaning they had their origin in animals.
text: Many viruses, bacteria and parasites that have caused major diseases in the past have been zoonotic, meaning they had their origin in animals.