Question: what is the size of the angles of an equilateral triangle
[{'answer': '60 °', 'provenance': [{'wikipedia_id': '173285', 'title': 'Equilateral triangle', 'start_paragraph_id': 100, 'start_character': 12, 'end_paragraph_id': 100, 'end_character': 18, 'bleu_score': 1.0, 'section': 'Section::::Derivation of area formula.:Using trigonometry.\n'}]}, {'provenance': [{'wikipedia_id': '173285', 'title': 'Equilateral triangle', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 322, 'bleu_score': 0.676388676486372, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4581041535686912764}, 'section': 'Section::::Abstract.'}]}]