Question: who wrote the first book relating to texas called relacion
[{'answer': 'Cabeza de Vaca', 'provenance': [{'wikipedia_id': '395145', 'title': 'Álvar Núñez Cabeza de Vaca', 'start_paragraph_id': 0, 'start_character': 12, 'end_paragraph_id': 0, 'end_character': 26, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '395145', 'title': 'Álvar Núñez Cabeza de Vaca', 'start_paragraph_id': 25, 'start_character': 0, 'end_paragraph_id': 25, 'end_character': 550, 'bleu_score': 0.978375183951072, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11519715033409583298}, 'section': 'Section::::"La relación of Álvar Núñez Cabeza de Vaca".\n'}]}]