Question: what are the steps of the sulfur cycle
[{'answer': 'Reduction of sulfate to sulfide', 'provenance': [{'wikipedia_id': '2465352', 'title': 'Sulfur cycle', 'start_paragraph_id': 5, 'start_character': 12, 'end_paragraph_id': 5, 'end_character': 43, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Mineralization of organic sulfur into inorganic forms , such as hydrogen sulfide ( H S ) , elemental sulfur , as well as sulfide minerals'}, {'answer': 'Incorporation of sulfide into organic compounds ( including metal - containing derivatives )'}, {'answer': 'Oxidation of hydrogen sulfide , sulfide , and elemental sulfur ( S ) to sulfate ( SO )'}]