Question: how many starbucks stores are in the world
[{'answer': '28,218'}, {'provenance': [{'wikipedia_id': '178771', 'title': 'Starbucks', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 199, 'bleu_score': 0.747167576992802, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 875327229534593592}, 'section': 'Section::::Abstract.'}]}]