Question: what is the source of oxygen inside the plant during photosynthesis
[{'answer': 'chloroplasts', 'provenance': [{'wikipedia_id': '24544', 'title': 'Photosynthesis', 'start_paragraph_id': 2, 'start_character': 269, 'end_paragraph_id': 2, 'end_character': 281, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '24544', 'title': 'Photosynthesis', 'start_paragraph_id': 82, 'start_character': 0, 'end_paragraph_id': 82, 'end_character': 674, 'bleu_score': 0.9812185674664711, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3688266257498862300}, 'section': 'Section::::Discovery.\n'}]}]