Assertion: pedestrian | /r/HasProperty | hard
Facets:
value: for self-driving cars
type: TRANSITIVE-OBJECT
Source sentences:
text: Pedestrians who are deaf or hard of hearing may use a white cane with a second strip of red at the bottom; they cannot hear a driver’s approach, horn or verbal warning
text: Timothy B. Lee, Ars Technica, "Pedestrians are a hard problem for self-driving cars—
text: The pedestrian is hard to detect because people are much poorer at seeing objects off the direct line-of-sight.