Question: when did weed become legal for recreational use in colorado
[{'answer': 'January 2014', 'provenance': [{'wikipedia_id': '25069021', 'title': 'Cannabis in Colorado', 'start_paragraph_id': 1, 'start_character': 216, 'end_paragraph_id': 1, 'end_character': 228, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '25069021', 'title': 'Cannabis in Colorado', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 444, 'bleu_score': 0.862059229079516, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8831422111041518390}, 'section': 'Section::::Abstract.'}]}]