Question: who plays lady sif in agents of shield
[{'answer': 'Jaimie Alexander', 'provenance': [{'wikipedia_id': '11850392', 'title': 'Jaimie Alexander', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 16, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '11850392', 'title': 'Jaimie Alexander', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 241, 'bleu_score': 0.6603622445115841, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2236422554683027168}, 'section': 'Section::::Abstract.'}]}]