Question: why was star wars episode iv released first
[{'answer': 'first film', 'provenance': [{'wikipedia_id': '52549', 'title': 'Star Wars (film)', 'start_paragraph_id': 1, 'start_character': 150, 'end_paragraph_id': 1, 'end_character': 160, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '52549', 'title': 'Star Wars (film)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 556, 'bleu_score': 0.5435697164305481, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 538710480748601884}, 'section': 'Section::::Abstract.'}]}]