Question: who plays the wanderer in vikings season 3
[{'answer': 'Kevin Durand', 'provenance': [{'wikipedia_id': '42646918', 'title': 'Vikings (season 3)', 'start_paragraph_id': 14, 'start_character': 12, 'end_paragraph_id': 14, 'end_character': 24, 'bleu_score': 1.0, 'section': 'Section::::Cast.:Main.\n'}]}]