Question: neptune was discovered by irregularities in the orbit of
[{'answer': 'Uranus', 'provenance': [{'wikipedia_id': '13002123', 'title': 'Discovery of Neptune', 'start_paragraph_id': 2, 'start_character': 243, 'end_paragraph_id': 2, 'end_character': 249, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '13002123', 'title': 'Discovery of Neptune', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 1138, 'bleu_score': 0.9808689416575881, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15858859889303532318}, 'section': 'Section::::Abstract.'}]}]