Assertion: canyon | /r/CapableOf | run along martian surface
Facets:
value: east of the tharsis region
type: LOCATION
Source sentences:
text: Valles Marineris  (Latin for Mariner Valleys, named after the Mariner 9 Mars orbiter of 1971–72 which discovered it) is a system of canyons that runs along the Martian surface east of the Tharsis region.