Question: which animal act as reservior for japanese encephalitis
[{'answer': 'Pigs', 'provenance': [{'wikipedia_id': '1432191', 'title': 'Japanese encephalitis', 'start_paragraph_id': 2, 'start_character': 79, 'end_paragraph_id': 2, 'end_character': 83, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'wild birds', 'provenance': [{'wikipedia_id': '1432191', 'title': 'Japanese encephalitis', 'start_paragraph_id': 2, 'start_character': 88, 'end_paragraph_id': 2, 'end_character': 98, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1432191', 'title': 'Japanese encephalitis', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 238, 'bleu_score': 0.9493253852526031, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13145770976427354770}, 'section': 'Section::::Abstract.'}]}]