Question: who designed the national flag of india and when
[{'answer': 'Pingali Venkayya', 'provenance': [{'wikipedia_id': '978203', 'title': 'Flag of India', 'start_paragraph_id': 1, 'start_character': 579, 'end_paragraph_id': 1, 'end_character': 595, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '978203', 'title': 'Flag of India', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 595, 'bleu_score': 0.863430347127025, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15537734023329168680}, 'section': 'Section::::Abstract.'}]}]