Question: who wrote he ain't heavy he's my brother lyrics
[{'answer': 'Bobby Scott', 'provenance': [{'wikipedia_id': '2313904', 'title': "He Ain't Heavy, He's My Brother", 'start_paragraph_id': 1, 'start_character': 57, 'end_paragraph_id': 1, 'end_character': 68, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Bob Russell', 'provenance': [{'wikipedia_id': '2313904', 'title': "He Ain't Heavy, He's My Brother", 'start_paragraph_id': 1, 'start_character': 73, 'end_paragraph_id': 1, 'end_character': 84, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2313904', 'title': "He Ain't Heavy, He's My Brother", 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 382, 'bleu_score': 0.8885560950807111, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13902526569634662181}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2313904', 'title': "He Ain't Heavy, He's My Brother", 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['"He Ain\'t Heavy, He\'s My Brother" is a ballad written by Bobby Scott and Bob Russell. Originally recorded by Kelly Gordon in 1969, the song became a worldwide hit for The Hollies later that year and again for Neil Diamond in 1970. It has been recorded by many artists in subsequent years. The Hollies\' and Rufus Wainwright\'s versions of the song were featured in the film "Zoolander".', '"He Ain\'t Heavy, He\'s My Brother" is a ballad written by Bobby Scott and Bob Russell.', '"He Ain\'t Heavy, He\'s My Brother" is a ballad written by Bobby Scott and Bob Russell.']}}]}]