Question: who sings get it on bang a gong
[{'answer': 'T. Rex', 'provenance': [{'wikipedia_id': '5590319', 'title': 'Get It On (T. Rex song)', 'start_paragraph_id': 0, 'start_character': 11, 'end_paragraph_id': 0, 'end_character': 17, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '5590319', 'title': 'Get It On (T. Rex song)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 348, 'bleu_score': 0.9712154609069981, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4051576948307905580}, 'section': 'Section::::Abstract.'}]}]