Question: which form of malaria is both the most common and the most severe
[{'answer': 'P. falciparum', 'provenance': [{'wikipedia_id': '20423', 'title': 'Malaria', 'start_paragraph_id': 14, 'start_character': 516, 'end_paragraph_id': 14, 'end_character': 529, 'bleu_score': 1.0, 'section': 'Section::::Cause.\n'}]}, {'provenance': [{'wikipedia_id': '20423', 'title': 'Malaria', 'start_paragraph_id': 14, 'start_character': 0, 'end_paragraph_id': 14, 'end_character': 836, 'bleu_score': 0.954595509605996, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3490149036059318252}, 'section': 'Section::::Cause.\n'}]}]