Question: what is the name of the smallest hummingbird
[{'answer': 'bee hummingbird', 'provenance': [{'wikipedia_id': '863968', 'title': 'Bee hummingbird', 'start_paragraph_id': 1, 'start_character': 4, 'end_paragraph_id': 1, 'end_character': 19, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '863968', 'title': 'Bee hummingbird', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 138, 'bleu_score': 0.9067110266941041, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12890855059349661502}, 'section': 'Section::::Abstract.'}]}]