Question: where does the tap water in london come from
[{'answer': 'abstracted from underground sources', 'provenance': [{'wikipedia_id': '10233495', 'title': 'London water supply infrastructure', 'start_paragraph_id': 63, 'start_character': 98, 'end_paragraph_id': 63, 'end_character': 133, 'bleu_score': 1.0, 'section': 'Section::::Present day.\n'}]}, {'answer': 'non-tidal parts of the Thames and Lea'}, {'provenance': [{'wikipedia_id': '10233495', 'title': 'London water supply infrastructure', 'start_paragraph_id': 63, 'start_character': 0, 'end_paragraph_id': 63, 'end_character': 133, 'bleu_score': 0.7947545184555561, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 18140570950845704048}, 'section': 'Section::::Present day.\n'}]}]