Question: who is the lead singer of rage against machine
[{'answer': 'Zack de la Rocha', 'provenance': [{'wikipedia_id': '80027', 'title': 'Rage Against the Machine', 'start_paragraph_id': 1, 'start_character': 127, 'end_paragraph_id': 1, 'end_character': 143, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '80027', 'title': 'Rage Against the Machine', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 346, 'bleu_score': 0.6567320373288671, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15637288686111249386}, 'section': 'Section::::Abstract.'}]}]