Question: what is the role of samantha in mahanati movie
[{'answer': 'Madhuravani', 'provenance': [{'wikipedia_id': '54881228', 'title': 'Mahanati', 'start_paragraph_id': 4, 'start_character': 283, 'end_paragraph_id': 4, 'end_character': 294, 'bleu_score': 1.0, 'section': 'Section::::Plot.\n'}]}, {'provenance': [{'wikipedia_id': '54881228', 'title': 'Mahanati', 'start_paragraph_id': 14, 'start_character': 0, 'end_paragraph_id': 14, 'end_character': 44, 'bleu_score': 0.5081327481546141, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10860106686569907645}, 'section': 'Section::::Cast.\n'}]}]