Question: is copper ii nitrate a compound or element
[{'answer': 'compound', 'provenance': [{'wikipedia_id': '556263', 'title': 'Copper(II) nitrate', 'start_paragraph_id': 1, 'start_character': 44, 'end_paragraph_id': 1, 'end_character': 52, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '556263', 'title': 'Copper(II) nitrate', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 412, 'bleu_score': 0.8815414337485661, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 271721019391860488}, 'section': 'Section::::Abstract.'}]}]