Question: who sings with willie nelson on gods problem child
[{'answer': 'Leon Russell', 'provenance': [{'wikipedia_id': '52903615', 'title': "God's Problem Child", 'start_paragraph_id': 3, 'start_character': 88, 'end_paragraph_id': 3, 'end_character': 100, 'bleu_score': 1.0, 'section': 'Section::::Content.\n'}]}, {'provenance': [{'wikipedia_id': '52903615', 'title': "God's Problem Child", 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 790, 'bleu_score': 0.965664648905967, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5606018435920527931}, 'section': 'Section::::Content.\n'}]}]