Question: what is the symbol of subset in math
[{'answer': '⊂', 'provenance': [{'wikipedia_id': '27631', 'title': 'Subset', 'start_paragraph_id': 9, 'start_character': 11, 'end_paragraph_id': 9, 'end_character': 12, 'bleu_score': 1.0, 'section': 'Section::::Definitions.\n'}]}, {'provenance': [{'wikipedia_id': '27631', 'title': 'Subset', 'start_paragraph_id': 14, 'start_character': 0, 'end_paragraph_id': 14, 'end_character': 222, 'bleu_score': 0.901155069266457, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12635736061709454109}, 'section': 'Section::::⊂ and ⊃ symbols.\n'}]}]