Question: how much did disney buy star wars franchise for
[{'answer': '$4.06 billion'}, {'provenance': [{'wikipedia_id': '80872', 'title': 'Lucasfilm', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 571, 'bleu_score': 0.7507738220317091, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17972659029246664287}, 'section': 'Section::::Abstract.'}]}]