skos:altLabel | - Rover
- rover
- rovers
- Rovers
- ''Spirit'', ''Opportunity''
- Mars Exploration Rover#Naming of Spirit and Opportunity
- MER
- MER Mars Exploration Rover mission
- MER-A
- MER-B
- MERs
- Mars Exploration Mission
- Mars Exploration Rover (MER) Mission
- Mars Exploration Rover (MER) Missions
- Mars Exploration Rover Mission
- Mars Exploration Rover Project
- Mars Exploration Rover mission
- Mars Exploration Rovers
- Mars Exploration mission
- Mars Rover
- Mars exploration rovers
- Mars rovers
- Martian Robots
- Martian rovers
- NASA sponsored student essay competition
- NASA-sponsored student essay competition
- Opportunity lander
- Rovers on Mars
- Spirit and Opportunity MERs
- Spirit lander
- exploration rovers
- two rover sites
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