Question: when did alaska become a territory of the united states
[{'answer': 'January 3 , 1959', 'provenance': [{'wikipedia_id': '451480', 'title': 'Territory of Alaska', 'start_paragraph_id': 12, 'start_character': 3, 'end_paragraph_id': 12, 'end_character': 19, 'bleu_score': 1.0, 'section': 'Section::::Statehood.\n'}]}]