Assertion: bassinet's portability | /r/HasProperty | the key
Facets:
value: to travel sleeper
type: PURPOSE
Source sentences:
text: Portability is the key to travel with babies; when folding it up, you can pack it into the travel bag, and there are even room for other essentials inside.
text: Portability is the key to travel sleeper; it determines whether your baby has a sound sleep outdoor.