Question: which dynasty described itself as the brahma kshatriya
[{'answer': 'Sena', 'provenance': [{'wikipedia_id': '1989483', 'title': 'Sena dynasty', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 4, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1989483', 'title': 'Sena dynasty', 'start_paragraph_id': 7, 'start_character': 0, 'end_paragraph_id': 7, 'end_character': 389, 'bleu_score': 0.96746874041754, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6631112501988869633}, 'section': 'Section::::Origins.\n'}]}]