Question: what was the purpose of the roman colosseum
[{'answer': 'gladiatorial contests', 'provenance': [{'wikipedia_id': '49603', 'title': 'Colosseum', 'start_paragraph_id': 2, 'start_character': 186, 'end_paragraph_id': 2, 'end_character': 207, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'public spectacles', 'provenance': [{'wikipedia_id': '49603', 'title': 'Colosseum', 'start_paragraph_id': 2, 'start_character': 212, 'end_paragraph_id': 2, 'end_character': 229, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'dramas based on Classical mythology', 'provenance': [{'wikipedia_id': '49603', 'title': 'Colosseum', 'start_paragraph_id': 2, 'start_character': 428, 'end_paragraph_id': 2, 'end_character': 463, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '49603', 'title': 'Colosseum', 'start_paragraph_id': 2, 'start_character': 38, 'end_paragraph_id': 2, 'end_character': 678, 'bleu_score': 0.849005223096135, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2270704439010108297}, 'section': 'Section::::Abstract.'}]}]