Question: who plays alex von strucker in agents of shield
[{'answer': 'Spencer Treat Clark', 'provenance': [{'wikipedia_id': '9952636', 'title': 'Werner von Strucker', 'start_paragraph_id': 2, 'start_character': 89, 'end_paragraph_id': 2, 'end_character': 108, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '9952636', 'title': 'Werner von Strucker', 'start_paragraph_id': 12, 'start_character': 0, 'end_paragraph_id': 12, 'end_character': 894, 'bleu_score': 0.9510537257851981, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6994289511562356530}, 'section': 'Section::::In other media.\n'}]}]