Question: when did michael jordan join the chicago bulls
[{'answer': '1984 NBA draft', 'provenance': [{'wikipedia_id': '20455', 'title': 'Michael Jordan', 'start_paragraph_id': 13, 'start_character': 782, 'end_paragraph_id': 13, 'end_character': 796, 'bleu_score': 1.0, 'section': 'Section::::College career.\n'}]}, {'provenance': [{'wikipedia_id': '20455', 'title': 'Michael Jordan', 'start_paragraph_id': 13, 'start_character': 0, 'end_paragraph_id': 13, 'end_character': 1536, 'bleu_score': 0.942348083087414, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13179287896035402094}, 'section': 'Section::::College career.\n'}]}]