Question: who sings lead vocals on i can't tell you why
[{'answer': 'Timothy B. Schmit', 'provenance': [{'wikipedia_id': '2813962', 'title': "I Can't Tell You Why", 'start_paragraph_id': 1, 'start_character': 155, 'end_paragraph_id': 1, 'end_character': 172, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2813962', 'title': "I Can't Tell You Why", 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 531, 'bleu_score': 0.901334827539192, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7960989088133746023}, 'section': 'Section::::Abstract.'}]}]