Question: where was the first world youth day held
[{'answer': 'Buenos Aires , Argentina', 'provenance': [{'wikipedia_id': '546270', 'title': 'World Youth Day', 'start_paragraph_id': 10, 'start_character': 21, 'end_paragraph_id': 10, 'end_character': 45, 'bleu_score': 1.0, 'section': 'Section::::History.:1987 to 1993.\n'}]}, {'provenance': [{'wikipedia_id': '546270', 'title': 'World Youth Day', 'start_paragraph_id': 10, 'start_character': 0, 'end_paragraph_id': 10, 'end_character': 200, 'bleu_score': 0.9402297675816911, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11685800530025363969}, 'section': 'Section::::History.:1987 to 1993.\n'}]}]