Question: who was the 2007 nba draft first pick
[{'answer': 'Greg Oden', 'provenance': [{'wikipedia_id': '5793078', 'title': '2007 NBA draft', 'start_paragraph_id': 2, 'start_character': 9, 'end_paragraph_id': 2, 'end_character': 18, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '5793078', 'title': '2007 NBA draft', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 870, 'bleu_score': 0.793868112373718, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10395125366233784163}, 'section': 'Section::::Abstract.'}]}]