Question: who is known as the father of trigonometry
[{'answer': 'Hipparchus of Nicaea', 'provenance': [{'wikipedia_id': '13600', 'title': 'Hipparchus', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 20, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '13600', 'title': 'Hipparchus', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 221, 'bleu_score': 0.6870732902171099, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3462111369507882845}, 'section': 'Section::::Abstract.'}]}]