Question: who gave the famous cross of gold speech
[{'answer': 'William Jennings Bryan', 'provenance': [{'wikipedia_id': '38725', 'title': 'Cross of Gold speech', 'start_paragraph_id': 1, 'start_character': 42, 'end_paragraph_id': 1, 'end_character': 64, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '38725', 'title': 'Cross of Gold speech', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 569, 'bleu_score': 0.9776501033621461, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4224554873533600886}, 'section': 'Section::::Abstract.'}]}]