Question: who plays sarah in dc legends of tomorrow
[{'answer': 'Caity Lotz', 'provenance': [{'wikipedia_id': '46299779', 'title': 'Legends of Tomorrow', 'start_paragraph_id': 30, 'start_character': 672, 'end_paragraph_id': 30, 'end_character': 682, 'bleu_score': 1.0, 'section': 'Section::::Production.:Development.\n'}]}, {'provenance': [{'wikipedia_id': '46299779', 'title': 'Legends of Tomorrow', 'start_paragraph_id': 11, 'start_character': 0, 'end_paragraph_id': 11, 'end_character': 373, 'bleu_score': 0.9669306597086381, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3950775407276100728}, 'section': 'Section::::Cast and characters.\n'}]}]