Question: who is called as savyasachi among pandavas of mahabharath
[{'answer': 'Arjuna', 'provenance': [{'wikipedia_id': '100254', 'title': 'Arjuna', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 6, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]