Question: when did oregon become the first state to pass initiative referendum laws
[{'answer': '2011', 'provenance': [{'wikipedia_id': '907259', 'title': 'Initiatives and referendums in the United States', 'start_paragraph_id': 75, 'start_character': 3, 'end_paragraph_id': 75, 'end_character': 7, 'bleu_score': 1.0, 'section': "Section::::Proposed reforms.:Citizens' Initiative Review.\n"}]}, {'provenance': [{'wikipedia_id': '907259', 'title': 'Initiatives and referendums in the United States', 'start_paragraph_id': 75, 'start_character': 0, 'end_paragraph_id': 75, 'end_character': 335, 'bleu_score': 0.96188712955549, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14182180710460410004}, 'section': "Section::::Proposed reforms.:Citizens' Initiative Review.\n"}]}]