Question: what is the first stage of the grief reaction response
[{'answer': 'denial', 'provenance': [{'wikipedia_id': '713491', 'title': 'Kübler-Ross model', 'start_paragraph_id': 1, 'start_character': 66, 'end_paragraph_id': 1, 'end_character': 72, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]