Question: what is the base of an isosceles triangle
[{'answer': 'the third side', 'provenance': [{'wikipedia_id': '315428', 'title': 'Isosceles triangle', 'start_paragraph_id': 4, 'start_character': 44, 'end_paragraph_id': 4, 'end_character': 58, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '315428', 'title': 'Isosceles triangle', 'start_paragraph_id': 9, 'start_character': 0, 'end_paragraph_id': 9, 'end_character': 417, 'bleu_score': 0.97451705556073, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4991238871515606550}, 'section': 'Section::::Terminology, classification, and examples.\n'}]}]