Question: how many age of empires games are there
[{'answer': 'seven', 'provenance': [{'wikipedia_id': '1932784', 'title': 'Age of Empires', 'start_paragraph_id': 1, 'start_character': 220, 'end_paragraph_id': 1, 'end_character': 225, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1932784', 'title': 'Age of Empires', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 271, 'bleu_score': 0.6678366033765151, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14540109556177621964}, 'section': 'Section::::Abstract.'}]}]