Assertion: penguin's egg | /r/HasProperty | preyed by giant petrels
Facets:
Source sentences:
text: The main predators of adult Royal Penguins are leopard seals but eggs and chicks are preyed upon by skuas, giant petrels and wekas.
text: The main predators of adult Snares Penguins are sea lions, but eggs and chicks are preyed upon by brown skuas and giant petrels.