Question: what group on the periodic table are noble gases
[{'answer': 'group 18', 'provenance': [{'wikipedia_id': '21140', 'title': 'Noble gas', 'start_paragraph_id': 2, 'start_character': 92, 'end_paragraph_id': 2, 'end_character': 100, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '21140', 'title': 'Noble gas', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 525, 'bleu_score': 0.9346183847893801, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16141130740991698054}, 'section': 'Section::::Abstract.'}]}]