Question: what is the symbol for yin and yang
[{'answer': 'taijitu symbol', 'provenance': [{'wikipedia_id': '144804', 'title': 'Yin and yang', 'start_paragraph_id': 3, 'start_character': 677, 'end_paragraph_id': 3, 'end_character': 691, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '144804', 'title': 'Yin and yang', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 785, 'bleu_score': 0.8113912249387231, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5622907005290306058}, 'section': 'Section::::Abstract.'}]}]