Question: who began the common core effort in 2009
[{'answer': 'the NGA', 'provenance': [{'wikipedia_id': '27684253', 'title': 'Common Core State Standards Initiative', 'start_paragraph_id': 6, 'start_character': 9, 'end_paragraph_id': 6, 'end_character': 16, 'bleu_score': 1.0, 'section': 'Section::::Development.\n'}]}, {'provenance': [{'wikipedia_id': '27684253', 'title': 'Common Core State Standards Initiative', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 804, 'bleu_score': 0.9851290761715561, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7359566601005654079}, 'section': 'Section::::Development.\n'}]}]