Assertion: narwhal | /r/CapableOf | receive echo
Facets:
value: on pads
type: LOCATION
value: in their lower jaws
type: LOCATION
Source sentences:
text: They discovered that not only do narwhals produce them at a rate of up to 1,000 clicks per second, and receive the echos back on pads in their lower jaws, they can also direct them with incredible accuracy, like the narrow beam of an adjustable flashlight.