Assertion: sill perch | /r/HasAspect | bolster
Facets:
value: to provide leverage
type: PURPOSE
Source sentences:
text: Perches that hang from the window use suction cups to provide a firm hold, while sill perches have bolsters to provide leverage.
text: Perches that hang from the window use suction cups to provide a firm hold, while sill perches have bolsters to provide leverage.