Assertion: hummingbird's feeder | /r/HasAspect | perch
Facets:
value: to serve bigger birds
type: PURPOSE
Source sentences:
text: Some feeders should have perches while others can be positioned for hovering birds.
text: Some feeders should have perches while others can be positioned for hovering birds.
text: These sturdier feeders have perches and larger reservoirs to better serve bigger birds.