Question: what type of server does active director run on
[{'answer': 'Windows Server', 'provenance': [{'wikipedia_id': '2807', 'title': 'Active Directory', 'start_paragraph_id': 1, 'start_character': 120, 'end_paragraph_id': 1, 'end_character': 134, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2807', 'title': 'Active Directory', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 418, 'bleu_score': 0.878479885964888, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 18280985496409641010}, 'section': 'Section::::Abstract.'}]}]