Question: how many navratna companies are there in india
[{'answer': '16', 'provenance': [{'wikipedia_id': '44028409', 'title': 'Public sector undertakings in India', 'start_paragraph_id': 12, 'start_character': 48, 'end_paragraph_id': 12, 'end_character': 50, 'bleu_score': 1.0, 'section': 'Section::::List of public sector undertakings.\n'}]}, {'provenance': [{'wikipedia_id': '44028409', 'title': 'Public sector undertakings in India', 'start_paragraph_id': 12, 'start_character': 0, 'end_paragraph_id': 12, 'end_character': 150, 'bleu_score': 0.9214109120166031, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14088475140257644755}, 'section': 'Section::::List of public sector undertakings.\n'}]}]