Question: what does the term breaking the fourth wall mean
[{'answer': 'is violated', 'provenance': [{'wikipedia_id': '76440', 'title': 'Fourth wall', 'start_paragraph_id': 3, 'start_character': 130, 'end_paragraph_id': 3, 'end_character': 141, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'performance convention', 'provenance': [{'wikipedia_id': '76440', 'title': 'Fourth wall', 'start_paragraph_id': 1, 'start_character': 21, 'end_paragraph_id': 1, 'end_character': 43, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '76440', 'title': 'Fourth wall', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 840, 'bleu_score': 0.9853469949554711, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 543076004278908982}, 'section': 'Section::::Abstract.'}]}]