Question: who was considered the greatest greek warrior at the time of the trojan war
[{'answer': 'Achilles', 'provenance': [{'wikipedia_id': '305', 'title': 'Achilles', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 8, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]