Question: who sings the song can't let go
[{'answer': 'Evie Sands', 'provenance': [{'wikipedia_id': '13385863', 'title': "I Can't Let Go", 'start_paragraph_id': 1, 'start_character': 164, 'end_paragraph_id': 1, 'end_character': 174, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'The Hollies', 'provenance': [{'wikipedia_id': '13385863', 'title': "I Can't Let Go", 'start_paragraph_id': 1, 'start_character': 302, 'end_paragraph_id': 1, 'end_character': 313, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Linda Ronstadt', 'provenance': [{'wikipedia_id': '13385863', 'title': "I Can't Let Go", 'start_paragraph_id': 1, 'start_character': 385, 'end_paragraph_id': 1, 'end_character': 399, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '13385863', 'title': "I Can't Let Go", 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 484, 'bleu_score': 0.952657101209585, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15652812843174104844}, 'section': 'Section::::Abstract.'}]}]