Question: who is considered the first tirthankar in jain religion
[{'answer': 'Rishabhanatha', 'provenance': [{'wikipedia_id': '1012752', 'title': 'Tirthankara', 'start_paragraph_id': 3, 'start_character': 408, 'end_paragraph_id': 3, 'end_character': 421, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1012752', 'title': 'Tirthankara', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 698, 'bleu_score': 0.950508855417424, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11439476024070229407}, 'section': 'Section::::Abstract.'}]}]