Question: what was the name of the first rover to land on mars
[{'answer': 'Mars 3', 'provenance': [{'wikipedia_id': '421366', 'title': 'Mars rover', 'start_paragraph_id': 3, 'start_character': 8, 'end_paragraph_id': 3, 'end_character': 14, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]