Question: when was solo a star wars story announced
[{'answer': 'In July 2015'}, {'provenance': [{'wikipedia_id': '52193417', 'title': 'Solo: A Star Wars Story', 'start_paragraph_id': 25, 'start_character': 105, 'end_paragraph_id': 25, 'end_character': 955, 'bleu_score': 0.652052693053171, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14234953013316273977}, 'section': 'Section::::Production.:Development.\n'}]}]