Assertion: lake's mile | /r/HasProperty | 20 km
Facets:
Source sentences:
text: The reservoir they detected — roughly 12 miles (20 km) in diameter, shaped like a rounded triangle and located about a mile (1.5 km) beneath the ice surface — represents the first stable body of liquid water ever found on Mars.
text: Located under a layer of Martian ice, the lake is about 12 miles (20 kilometers) wide, said the report in the US journal Science.