Question: darwin finches refers to a group of which creature
[{'answer': 'passerine birds', 'provenance': [{'wikipedia_id': '328709', 'title': "Darwin's finches", 'start_paragraph_id': 1, 'start_character': 90, 'end_paragraph_id': 1, 'end_character': 105, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '328709', 'title': "Darwin's finches", 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 654, 'bleu_score': 0.944244497178608, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3173675468101777186}, 'section': 'Section::::Abstract.'}]}]