Question: what type of survivorship curve is line a representative of
[{'answer': 'Type II', 'provenance': [{'wikipedia_id': '16612525', 'title': 'Survivorship curve', 'start_paragraph_id': 8, 'start_character': 293, 'end_paragraph_id': 8, 'end_character': 300, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]