Question: what is the meaning of e and oe
[{'answer': 'Errors and omissions excepted', 'provenance': [{'wikipedia_id': '2330597', 'title': 'Errors and omissions excepted', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 29, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2330597', 'title': 'Errors and omissions excepted', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 227, 'bleu_score': 0.9419661180380051, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 18405224540465486621}, 'section': 'Section::::Abstract.'}]}]