Question: what does it mean for an album to go diamond
[{'answer': 'sales of ten million units', 'provenance': [{'wikipedia_id': '308242', 'title': 'Music recording certification', 'start_paragraph_id': 6, 'start_character': 1005, 'end_paragraph_id': 6, 'end_character': 1031, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '308242', 'title': 'Music recording certification', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 1017, 'bleu_score': 0.881794363942596, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15368021977680487889}, 'section': 'Section::::History.\n'}]}]