Question: when was the rupee symbol introduced in india
[{'answer': '15 July 2010', 'provenance': [{'wikipedia_id': '28043791', 'title': 'Indian rupee sign', 'start_paragraph_id': 1, 'start_character': 205, 'end_paragraph_id': 1, 'end_character': 217, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]