Question: who controlled blue cross when it was formed
[{'answer': '1929', 'provenance': [{'wikipedia_id': '3462395', 'title': 'Blue Cross Blue Shield Association', 'start_paragraph_id': 1, 'start_character': 241, 'end_paragraph_id': 1, 'end_character': 245, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '3462395', 'title': 'Blue Cross Blue Shield Association', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 416, 'bleu_score': 0.970362113628587, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13897379912252697669}, 'section': 'Section::::Abstract.'}]}]