Assertion: opportunity | /r/CapableOf | last on the planet's surface
Facets:
value: in part
type: DEGREE
value: according to don banfield
type: OTHER
Source sentences:
text: Opportunity and Spirit, which landed on the planet in 2004, were expected to last only 90 Martian days (each about 40 minutes longer than an Earth day), on the planet's surface — in part because scientists expected that dust would slowly bury the robots, according to Don Banfield, a planetary scientist at Cornell University who works with the Mars Exploration Rover team.