Question: where does the tradition of slam poetry come from
[{'answer': 'Chicago in 1984', 'provenance': [{'wikipedia_id': '28828', 'title': 'Poetry slam', 'start_paragraph_id': 1, 'start_character': 108, 'end_paragraph_id': 1, 'end_character': 123, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '28828', 'title': 'Poetry slam', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 763, 'bleu_score': 0.8402391564471171, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7753777088474193966}, 'section': 'Section::::Abstract.'}]}]