Question: who sang on the back in black album
[{'answer': 'Brian Johnson', 'provenance': [{'wikipedia_id': '196945', 'title': 'Back in Black', 'start_paragraph_id': 1, 'start_character': 198, 'end_paragraph_id': 1, 'end_character': 211, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Malcolm Young', 'provenance': [{'wikipedia_id': '196945', 'title': 'Back in Black', 'start_paragraph_id': 3, 'start_character': 45, 'end_paragraph_id': 3, 'end_character': 58, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Cliff Williams', 'provenance': [{'wikipedia_id': '196945', 'title': 'Back in Black', 'start_paragraph_id': 34, 'start_character': 12, 'end_paragraph_id': 34, 'end_character': 26, 'bleu_score': 1.0, 'section': 'Section::::Personnel.:AC/DC.\n'}]}, {'provenance': [{'wikipedia_id': '196945', 'title': 'Back in Black', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ["Back in Black is the seventh studio album by Australian rock band AC/DC. It was released on 25 July 1980 by Albert Productions and Atlantic Records. It is the band's first album to feature vocalist Brian Johnson, following the death of previous vocalist Bon Scot", "Back in Black is the seventh studio album by Australian rock band AC/DC. It was released on 25 July 1980 by Albert Productions and Atlantic Records. It is the band's first album to feature vocalist Brian Johnson, following the death of previous vocalist Bon Scott.", "It is the band's first album to feature vocalist Brian Johnson,"]}}]}, {'provenance': [{'wikipedia_id': '2246856', 'title': 'Back on the Streets (Gary Moore album)', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['Back on the Streets is an album by Northern Irish blues-rock guitarist Gary Moore, released in 1978, and his first authentic solo record (1973\'s "Grinding Stone" album being credited to The Gary Moore Band). Thin Lizzy bassist/vocalist Phil Lynott and drummer Brian Downey appear on four songs, including "Don\'t Believe A Word" (which originally appeared on the 1976 Thin Lizzy album "Johnny the Fox") and the UK top 10 single "Parisienne Walkways". On the album\'s sleeve, Moore is depicted leaving notorious prison Wormwood Scrubs in the Inner London Borough of Hammersmith and Fulham in a photograph by Chalkie Davies.', 'Back on the Streets is an album by Northern Irish blues-rock guitarist Gary Moore, released in 1978, and his first authentic solo record (1973\'s "Grinding Stone" album being credited to The Gary Moore Band). Thin Lizzy bassist/vocalist Phil Lynott and drummer Brian Downey appear on four songs, including "Don\'t Believe A Word" (which originally appeared on the 1976 Thin Lizzy album "Johnny the Fox") and the UK top 10 single "Parisienne Walkways". On the album\'s sleeve, Moore is depicted leaving notorious prison Wormwood Scrubs in the Inner London Borough of Hammersmith and Fulham in a photograph by Chalkie Davies.']}}]}]