Question: who created the machines in horizon zero dawn
[{'answer': 'Guerrilla Games', 'provenance': [{'wikipedia_id': '46991545', 'title': 'Horizon Zero Dawn', 'start_paragraph_id': 1, 'start_character': 62, 'end_paragraph_id': 1, 'end_character': 77, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]