Question: when were the new 7 wonders of the world announced
[{'answer': '7 July 2007', 'provenance': [{'wikipedia_id': '7486293', 'title': 'New7Wonders of the World', 'start_paragraph_id': 1, 'start_character': 303, 'end_paragraph_id': 1, 'end_character': 314, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '7486293', 'title': 'New7Wonders of the World', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 324, 'bleu_score': 0.8983343737277121, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 632368123934502669}, 'section': 'Section::::Abstract.'}]}]