Question: what is the national bird of costa rica
[{'answer': 'The clay - colored thrush', 'provenance': [{'wikipedia_id': '3411763', 'title': 'Clay-colored thrush', 'start_paragraph_id': 8, 'start_character': 0, 'end_paragraph_id': 8, 'end_character': 31, 'bleu_score': 1.0, 'section': 'Section::::Ecology.\n'}]}, {'provenance': [{'wikipedia_id': '3411763', 'title': 'Clay-colored thrush', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 243, 'bleu_score': 0.8928756684056031, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6950152001739721564}, 'section': 'Section::::Abstract.'}]}]