Question: who was the elf that came to helm's deep
[{'answer': 'Legolas', 'provenance': [{'wikipedia_id': '426975', 'title': 'Battle of the Hornburg', 'start_paragraph_id': 9, 'start_character': 298, 'end_paragraph_id': 9, 'end_character': 305, 'bleu_score': 1.0, 'section': 'Section::::The Battle.:The battle.\n'}]}, {'provenance': [{'wikipedia_id': '426975', 'title': 'Battle of the Hornburg', 'start_paragraph_id': 9, 'start_character': 0, 'end_paragraph_id': 9, 'end_character': 393, 'bleu_score': 0.972407137066537, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 918718713809800413}, 'section': 'Section::::The Battle.:The battle.\n'}]}]