Assertion: lemur's tail | /r/CapableOf | serve as visual signal
Facets:
Source sentences:
text: The lemur's thick bushy tail serves as a visual signal when it's threatened or as a balancing tool when it leaps through the trees.
text: The lemur's thick bushy tail serves as a visual signal when it is threatened or as a balancing tool when it leaps through the trees.
text: Thick bushy tail serves as a visual signal when threatened and as a balancing tool.