Question: why is there a famine in south sudan
[{'answer': 'war', 'provenance': [{'wikipedia_id': '53250322', 'title': '2017 South Sudan famine', 'start_paragraph_id': 1, 'start_character': 149, 'end_paragraph_id': 1, 'end_character': 152, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'drought', 'provenance': [{'wikipedia_id': '53250322', 'title': '2017 South Sudan famine', 'start_paragraph_id': 1, 'start_character': 157, 'end_paragraph_id': 1, 'end_character': 164, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '53250322', 'title': '2017 South Sudan famine', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 410, 'bleu_score': 0.5985690025151631, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15820069266651220516}, 'section': 'Section::::Abstract.'}]}]