Question: who was the founder of buddhism and when was it founded
[{'answer': '5th century BCE'}, {'answer': 'Siddhārtha Gautama', 'provenance': [{'wikipedia_id': '956960', 'title': 'History of Buddhism', 'start_paragraph_id': 1, 'start_character': 225, 'end_paragraph_id': 1, 'end_character': 243, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '956960', 'title': 'History of Buddhism', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 724, 'bleu_score': 0.939516250852901, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10235426964042334397}, 'section': 'Section::::Abstract.'}]}]