Question: who discovered neptune in the late 19th century
[{'answer': 'Johann Gottfried Galle', 'provenance': [{'wikipedia_id': '13002123', 'title': 'Discovery of Neptune', 'start_paragraph_id': 1, 'start_character': 278, 'end_paragraph_id': 1, 'end_character': 300, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '13002123', 'title': 'Discovery of Neptune', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 587, 'bleu_score': 0.9396430371117861, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 167335014305571582}, 'section': 'Section::::Abstract.'}]}]