Question: who built the death star in star wars
[{'answer': 'Galactic Empire', 'provenance': [{'wikipedia_id': '53888', 'title': 'Death Star', 'start_paragraph_id': 11, 'start_character': 176, 'end_paragraph_id': 11, 'end_character': 191, 'bleu_score': 1.0, 'section': 'Section::::Depiction.:Original Death Star.\n'}]}]