Question: when did the gm plant in janesville close
[{'answer': 'April 23 , 2009', 'provenance': [{'wikipedia_id': '2044555', 'title': 'Janesville Assembly Plant', 'start_paragraph_id': 16, 'start_character': 81, 'end_paragraph_id': 16, 'end_character': 96, 'bleu_score': 1.0, 'section': 'Section::::Decommissioning.\n'}]}, {'provenance': [{'wikipedia_id': '2044555', 'title': 'Janesville Assembly Plant', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 265, 'bleu_score': 0.953991849837532, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5069366027042099316}, 'section': 'Section::::Abstract.'}]}]