Question: who wrote knock knock knocking on heavens door
[{'answer': 'Bob Dylan', 'provenance': [{'wikipedia_id': '1308626', 'title': "Knockin' on Heaven's Door", 'start_paragraph_id': 1, 'start_character': 41, 'end_paragraph_id': 1, 'end_character': 50, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '3602484', 'title': "Knockin' on Heaven's Door (disambiguation)", 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['"Knockin\' on Heaven\'s Door" is a 1973 song written by Bob Dylan.', '"Knockin\' on Heaven\'s Door" is a 1973 song written by Bob Dylan.']}}]}, {'provenance': [{'wikipedia_id': '12822130', 'title': "Knockin' on Heaven's Door (1997 film)", 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ["Knockin' on Heaven's Door is a 1997 German criminal comedy, by Thomas Jahn, starring Til Schweiger, Moritz Bleibtreu, Jan Josef Liefers and Rutger Hauer. Its name derives from the Bob Dylan song which is also on the film's soundtrack. It was entered into the 20th Moscow International Film Festival where Til Schweiger won the Silver St. George for Best Actor. Two patients (Martin Brest and Rudi Wurlitzer) meet in a hospital, just after learning that both have an untreatable disease. They start talking about their death\rhighlight sentence(s) containing evidence, not only the answer", "Knockin' on Heaven's Door is a 1997 German criminal comedy, by Thomas Jahn, starring Til Schweiger, Moritz Bleibtreu, Jan Josef Liefers and Rutger Hauer. Its name derives from the Bob Dylan song which is also on the film's soundtrack.", "Knockin' on Heaven's Door is a 1997 German criminal comedy, by Thomas Jahn, starring Til Schweiger, Moritz Bleibtreu, Jan Josef Liefers and Rutger Hauer. Its name derives from the Bob Dylan song which is also on the film's soundtrack."]}}]}, {'provenance': [{'wikipedia_id': '1308626', 'title': "Knockin' on Heaven's Door", 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['"Knockin\' on Heaven\'s Door" is a song by Bob Dylan, written for the soundtrack of the 1973 film "Pat Garrett and Billy the Kid". Released as a single two months after the film\'s release, it became a worldwide hit, reaching the Top 10 in several countries. The song became one of Dylan\'s most popular and most covered post-1960s compositions, spawning covers from Guns N\' Roses, Eric Clapton, Randy Crawford and more. Described by Dylan biographer, Clinton Heylin, as "an exercise in splendid simplicity", the song features two verses, each of which represent the film\'s title characters and American frontier legends Pat Garrett and Billy the Kid.\rhighlight sentence(s) containing evidence, not only the answer', '"Knockin\' on Heaven\'s Door" is a song by Bob Dylan, written for the soundtrack of the 1973 film "Pat Garrett and Billy the Kid"', '"Knockin\' on Heaven\'s Door" is a song by Bob Dylan, written for the soundtrack of the 1973 film "Pat Garrett and Billy the Kid". Released as a single two months after the film\'s release, it became a worldwide hit, reaching the Top 10 in several countries.']}}]}]