Question: what is the name of the bridge in prague
[{'answer': 'Charles Bridge', 'provenance': [{'wikipedia_id': '515933', 'title': 'Charles Bridge', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 14, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '515933', 'title': 'Charles Bridge', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 755, 'bleu_score': 0.902781103015146, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13381292593999922983}, 'section': 'Section::::Abstract.'}]}]