Question: what is the name for the dark spots on the moon
[{'answer': 'maria ( singular mare )'}, {'provenance': [{'wikipedia_id': '32455359', 'title': 'List of lunar features', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 501, 'bleu_score': 0.770502730963724, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6436075750150384123}, 'section': 'Section::::Water features.\n'}]}]