Question: how much percentage of the world is vegetarian
[{'answer': '21.8 %', 'provenance': [{'wikipedia_id': '6946102', 'title': 'Vegetarianism by country', 'start_paragraph_id': 37, 'start_character': 59, 'end_paragraph_id': 37, 'end_character': 67, 'bleu_score': 1.0, 'section': 'Section::::Europe.:Belgium.\n'}]}]