Question: who was at the helm of the national negro congress that convened in chicago in 1936
[{'answer': 'A. Philip Randolph', 'provenance': [{'wikipedia_id': '8270296', 'title': 'National Negro Congress', 'start_paragraph_id': 18, 'start_character': 270, 'end_paragraph_id': 18, 'end_character': 288, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'answer': 'John P. Davis', 'provenance': [{'wikipedia_id': '8270296', 'title': 'National Negro Congress', 'start_paragraph_id': 2, 'start_character': 422, 'end_paragraph_id': 2, 'end_character': 435, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '8270296', 'title': 'National Negro Congress', 'start_paragraph_id': 18, 'start_character': 0, 'end_paragraph_id': 18, 'end_character': 532, 'bleu_score': 0.953332021168892, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6176608596769970271}, 'section': 'Section::::History.\n'}]}]