Question: an element or compound which occurs naturally in the earth is a(n)
[{'answer': 'primordial', 'provenance': [{'wikipedia_id': '5659', 'title': 'Chemical element', 'start_paragraph_id': 12, 'start_character': 656, 'end_paragraph_id': 12, 'end_character': 666, 'bleu_score': 1.0, 'section': 'Section::::Description.\n'}]}, {'provenance': [{'wikipedia_id': '5659', 'title': 'Chemical element', 'start_paragraph_id': 50, 'start_character': 0, 'end_paragraph_id': 50, 'end_character': 679, 'bleu_score': 0.9796927878356411, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2990525072371114952}, 'section': 'Section::::Description.:Properties.:Occurrence and origin on Earth.\n'}]}]