Question: who sang lead vocals on take it easy
[{'answer': 'Glenn Frey', 'provenance': [{'wikipedia_id': '7768118', 'title': 'Take It Easy', 'start_paragraph_id': 1, 'start_character': 55, 'end_paragraph_id': 1, 'end_character': 65, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '7768118', 'title': 'Take It Easy', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 509, 'bleu_score': 0.9802931511945101, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12236069852746702909}, 'section': 'Section::::Abstract.'}]}]