Assertion: vulture's characteristic | /r/ObjectUse | used by human
Facets:
Source sentences:
text: This characteristic of New World vultures has been used by humans: ethyl mercaptan is injected into pipelines, and engineers looking for leaks then follow the vultures.
text: This characteristic of New World Vultures has been used by humans: ethyl mercaptan is injected into pipelines, and engineers looking for leaks then follow the foraging vultures.