Question: where does tap water in london come from
[{'answer': 'River Thames', 'provenance': [{'wikipedia_id': '38373813', 'title': 'Water supply and sanitation in London', 'start_paragraph_id': 3, 'start_character': 109, 'end_paragraph_id': 3, 'end_character': 121, 'bleu_score': 1.0, 'section': 'Section::::Water supply.\n'}]}, {'answer': 'River Lea'}, {'provenance': [{'wikipedia_id': '38373813', 'title': 'Water supply and sanitation in London', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 243, 'bleu_score': 0.8846179250781581, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5661337278963158337}, 'section': 'Section::::Water supply.\n'}]}]