Assertion: hydrothermal vent | /r/HasProperty | crack
Facets:
value: in the ocean floor
type: LOCATION
value: in the earth’s surface
type: LOCATION
Source sentences:
text: A hydrothermal vent is a crack or breakage in the Earth’s surface.
text: Hydrothermal vents are cracks in the ocean floor or chimney-like structures extending from the ocean floor up to 150 feet (45 meters) high.