Question: what element on the periodic table has the highest melting point
[{'answer': 'tungsten', 'provenance': [{'wikipedia_id': '30046', 'title': 'Tungsten', 'start_paragraph_id': 1, 'start_character': 94, 'end_paragraph_id': 1, 'end_character': 102, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '30046', 'title': 'Tungsten', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 628, 'bleu_score': 0.9367837841888531, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15133284574158823466}, 'section': 'Section::::Abstract.'}]}]