Question: why do they use john doe and jane doe
[{'answer': 'refer to an unidentified person'}, {'answer': 'a party in a legal action whose identity is being withheld officially'}, {'answer': "a hypothetical `` everyman '' in other contexts"}, {'provenance': [{'wikipedia_id': '51853', 'title': 'John Doe', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 617, 'bleu_score': 0.5598826640799951, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 18316208020495678225}, 'section': 'Section::::Abstract.'}]}]