Question: who plays sons of anarchy president in mayans
[{'answer': 'Marcus Álvarez', 'provenance': [{'wikipedia_id': '23477757', 'title': 'Marcus Álvarez', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 14, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '23477757', 'title': 'Marcus Álvarez', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 350, 'bleu_score': 0.9128953582819581, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5685861592551074896}, 'section': 'Section::::Abstract.'}]}]