Question: when was punjab annexed to the british empire
[{'answer': '1849', 'provenance': [{'wikipedia_id': '3177624', 'title': 'Punjab Province (British India)', 'start_paragraph_id': 1, 'start_character': 129, 'end_paragraph_id': 1, 'end_character': 133, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '3177624', 'title': 'Punjab Province (British India)', 'start_paragraph_id': 1, 'start_character': 74, 'end_paragraph_id': 1, 'end_character': 639, 'bleu_score': 0.778180148937432, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2105423604911973418}, 'section': 'Section::::Abstract.'}]}]