Assertion: penguin | /r/HasAspect | unique voice
Facets:
Source sentences:
text: Each penguin has a unique voice, and that’s why they can recognize each other.
text: Each penguin has a unique call.
text: What is surprising is the fact that each penguin has a unique tone through which they can find their better half and kids.
text: Each penguin has a unique sound and they will call with this to locate their mate in large groups.
text: Penguins have a unique voice or call that they use to find their mates and chicks in large groups of sometimes a thousand penguins or more!