Question: what led to enron worldcom and the like
[{'answer': 'complex financial statements', 'provenance': [{'wikipedia_id': '11954274', 'title': 'Enron scandal', 'start_paragraph_id': 13, 'start_character': 8, 'end_paragraph_id': 13, 'end_character': 36, 'bleu_score': 1.0, 'section': 'Section::::Causes of downfall.\n'}]}, {'answer': 'complex business model and unethical practices'}, {'provenance': [{'wikipedia_id': '11954274', 'title': 'Enron scandal', 'start_paragraph_id': 13, 'start_character': 0, 'end_paragraph_id': 13, 'end_character': 286, 'bleu_score': 0.9493253852526031, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12624736530679015497}, 'section': 'Section::::Causes of downfall.\n'}]}]