Question: who sent his daughter and son to srilanka to spread boudh religion
[{'answer': 'Emperor Ashoka', 'provenance': [{'wikipedia_id': '981293', 'title': 'Sanghamitta', 'start_paragraph_id': 1, 'start_character': 65, 'end_paragraph_id': 1, 'end_character': 79, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '981293', 'title': 'Sanghamitta', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 838, 'bleu_score': 0.985964042079227, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17104916693492455648}, 'section': 'Section::::Abstract.'}]}]