Question: what element is a metal but liquid at room temperature
[{'answer': 'mercury', 'provenance': [{'wikipedia_id': '29559759', 'title': 'Liquid metal', 'start_paragraph_id': 1, 'start_character': 149, 'end_paragraph_id': 1, 'end_character': 156, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '29559759', 'title': 'Liquid metal', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 318, 'bleu_score': 0.962600167205617, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9786883274563749408}, 'section': 'Section::::Abstract.'}]}]