Question: who sings light at the end of the tunnel
[{'answer': 'B.B. Watson'}, {'provenance': [{'wikipedia_id': '48528756', 'title': 'Light at the End of the Tunnel (song)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 366, 'bleu_score': 0.9318557434050331, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 18170316426181268329}, 'section': 'Section::::Abstract.'}]}]