Question: who did the astros trade for brandon backe
[{'answer': 'Geoff Blum', 'provenance': [{'wikipedia_id': '1742196', 'title': 'Brandon Backe', 'start_paragraph_id': 14, 'start_character': 92, 'end_paragraph_id': 14, 'end_character': 102, 'bleu_score': 1.0, 'section': 'Section::::Major leagues.:Houston.\n'}]}, {'provenance': [{'wikipedia_id': '1742196', 'title': 'Brandon Backe', 'start_paragraph_id': 14, 'start_character': 0, 'end_paragraph_id': 14, 'end_character': 102, 'bleu_score': 0.7647860170437231, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1704717994311475843}, 'section': 'Section::::Major leagues.:Houston.\n'}]}]