Question: essex town used to house the terminus of the london underground
[{'answer': 'Epping , Essex'}, {'provenance': [{'wikipedia_id': '72789', 'title': 'Central line (London Underground)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 430, 'bleu_score': 0.7278129263324511, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14644485369442038613}, 'section': 'Section::::Abstract.'}]}]