Question: what are the giants in attack on titan
[{'answer': 'Titans', 'provenance': [{'wikipedia_id': '31773051', 'title': 'Attack on Titan', 'start_paragraph_id': 5, 'start_character': 760, 'end_paragraph_id': 5, 'end_character': 766, 'bleu_score': 1.0, 'section': 'Section::::Synopsis.:Setting.\n'}]}]