Assertion: dog whistle | /r/HasProperty | a training device
Facets:
Source sentences:
text: A silent dog whistle is a training device used by dog owners, hunters, and professional dog trainers to give commands over longer distances where verbal commands may not work.
text: A silent dog whistle, also known as the Galton’s whistle named after its inventor Francis Galton, is a training device that uses ultrasonic sounds.