Assertion: doorbell's feature | /r/HasProperty | helpful
Facets:
Source sentences:
text: Features like person detection and geofencing are helpful and easy-to-use, and you can also upgrade to the Nest Aware cloud subscription service to enable facial recognition and access to saved recordings.
text: This feature is helpful because it will prevent you from receiving continual alerts from passing cars or people walking up and down the sidewalk, etc.