Question: vikram samvat calender is official in which country
[{'answer': 'Nepal', 'provenance': [{'wikipedia_id': '1675364', 'title': 'Vikram Samvat', 'start_paragraph_id': 1, 'start_character': 212, 'end_paragraph_id': 1, 'end_character': 217, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1675364', 'title': 'Vikram Samvat', 'start_paragraph_id': 22, 'start_character': 0, 'end_paragraph_id': 22, 'end_character': 461, 'bleu_score': 0.8176230652009491, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3213089144963211468}, 'section': 'Section::::The calendar system.\n'}]}, {'provenance': [{'wikipedia_id': '1675364', 'title': 'Vikram Samvat', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['Vikram Samvat (IAST: Vikrama Samvat) (abbreviated as V.S. (or VS) or B.S. (or BS)); ) (also called the Vikrami calendar) is the historical Hindu calendar from the Indian subcontinent and the official calendar of Nepal. It is also used in few states of India. It uses lunar months and solar sidereal years.', 'Vikram Samvat (IAST: Vikrama Samvat) (abbreviated as V.S. (or VS) or B.S. (or BS)); ) (also called the Vikrami calendar) is the historical Hindu calendar from the Indian subcontinent and the official calendar of Nepal. It is also used in few states of India. It uses lunar months and solar sidereal years.', 'Vikram Samvat (IAST: Vikrama Samvat) (abbreviated as V.S. (or VS) or B.S. (or BS)); ) (also called the Vikrami calendar) is the historical Hindu calendar from the Indian subcontinent and the official calendar of Nepal.']}}]}]