Question: what was the official name of dehradhun during british raj
[{'answer': 'Dehra', 'provenance': [{'wikipedia_id': '1156018', 'title': 'Dehradun', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 5, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1156018', 'title': 'Dehradun', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 509, 'bleu_score': 0.7638309343226081, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10550838248053142023}, 'section': 'Section::::Abstract.'}]}]